4.8 Article

Effects of size and shell thickness of TiO2 hierarchical hollow spheres on photocatalytic behavior: An experimental and theoretical study

Journal

APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 147, Issue -, Pages 499-507

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2013.09.033

Keywords

Mie scattering; Hierarchical structure; Mie theory; Simulation; Ostwald ripening

Funding

  1. National Science Council of the Republic of China, Taiwan [NSC 101-2113-M-007-012-MY3, NSC 101-2811-M-032-013]

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Through a self-sacrificing template method, highly uniform hollow-spheres of TiO2 anatase are synthesized with controllable diameter from 365 nm to 930 nm. Compared to large hollow spheres, a large enhancement in the photocatalytic activity is reported for the small hollow spheres (with a thickness of 50 nm). By extending Mie's scattering theory from solid- to hollow-spheres, for a spherical scatter with a diameter of 300-900 nm, theoretical calculation reveal that each singular hollow sphere has absorption power equivalent to a solid sphere as the shell thickness parameter reaches a critical value of 0.3-0.6. This critical thickness parameter is independent to the size of a single hollow sphere, demonstrating that hollow spheres have quantitative advantages over solid spheres of the same weight. Moreover, calculation supported that small hollow spheres have stronger absorption power than large hollow spheres due to higher thickness. This greatly enhance the performance of small hollow spheres under a photocatalytic test. Our theoretical results showed good agreement to the experimental measurements, and provided a framework for the design of hollow-sphere nano-particles for optimized absorption power. (C) 2013 Elsevier B.V. All rights reserved.

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Kovalam, N. Koyama, D. B. Kozak, C. Kozakai, V Kringel, N. Krishnendu, A. Krolak, G. Kuehn, F. Kuei, P. Kuijer, S. Kulkarni, A. Kumar, Prayush Kumar, Rahul Kumar, Rakesh Kumar, J. Kume, K. Kuns, Y. Kuromiya, S. Kuroyanagi, K. Kwak, G. Lacaille, P. Lagabbe, D. Laghi, E. Lalande, M. Lalleman, T. L. Lam, A. Lamberts, M. Landry, B. B. Lane, R. N. Lang, J. Lange, B. Lantz, I La Rosa, A. Lartaux-Vollard, P. D. Lasky, M. Laxen, A. Lazzarini, C. Lazzaro, P. Leaci, S. Leavey, S. LeBohec, Y. K. Lecoeuche, E. Lee, H. M. Lee, H. W. Lee, K. Lee, R. Lee, I. N. Legred, J. Lehmann, A. Lemaitre, M. Lenti, M. Leonardi, E. Leonova, N. Leroy, N. Letendre, C. Levesque, Y. Levin, J. N. Leviton, K. Leyde, A. K. Y. Li, B. Li, J. Li, K. L. Li, P. Li, T. G. F. Li, X. Li, C-Y Lin, E. T. Lin, F-K Lin, F-L Lin, H. L. Lin, L. C-C Lin, F. Linde, S. D. Linker, J. N. Linley, T. B. Littenberg, G. C. Liu, J. Liu, K. Liu, X. Liu, F. Llamas, R. K. L. Lo, T. Lo, L. T. London, A. Longo, D. Lopez, M. Lopez Portilla, M. 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McCuller, G. McGhee, S. C. McGuire, C. McIsaac, J. McIver, T. McRae, S. T. McWilliams, D. Meacher, M. Mehmet, A. K. Mehta, Q. Meijer, A. Melatos, D. A. Melchor, G. Mendell, A. Menendez-Vazquez, C. S. Menoni, R. A. Mercer, L. Mereni, K. Merfeld, E. L. Merilh, J. D. Merritt, M. Merzougui, S. Meshkov, C. Messenger, C. Messick, P. M. Meyers, F. Meylahn, A. Mhaske, A. Miani, H. Miao, I Michaloliakos, C. Michel, Y. Michimura, H. Middleton, D. P. Mihaylov, L. Milano, A. L. Miller, A. Miller, B. Miller, M. Millhouse, J. C. Mills, E. Milotti, Y. Minenkov, N. Mio, Ll M. Mir, M. Miravet-Tenes, A. Mishkin, C. Mishra, T. Mishra, T. Mistry, S. Mitra, V. P. Mitrofanov, G. Mitselmakher, R. Mittleman, O. Miyakawa, K. Miyo, S. Miyoki, Geoffrey Mo, L. M. Modafferi, E. Moguel, K. Mogushi, S. R. P. Mohapatra, S. R. Mohite, I Molina, M. Molina-Ruiz, M. Mondin, M. Montani, C. J. Moore, J. Moragues, D. Moraru, F. Morawski, A. More, C. Moreno, G. Moreno, Y. Mori, S. Morisaki, N. Morisue, Y. Moriwaki, B. Mours, C. M. Mow-Lowry, S. Mozzon, F. Muciaccia, Arunava Mukherjee, D. Mukherjee, Soma Mukherjee, Subroto Mukherjee, Suvodip Mukherjee, N. Mukund, A. Mullavey, J. Munch, E. A. Muniz, P. G. Murray, R. Musenich, S. Muusse, S. L. Nadji, K. Nagano, A. Nagar, K. Nakamura, H. Nakano, M. Nakano, Y. Nakayama, V Napolano, I Nardecchia, T. Narikawa, H. Narola, L. Naticchioni, B. Nayak, R. K. Nayak, B. F. Neil, J. Neilson, A. Nelson, T. J. N. Nelson, M. Nery, P. Neubauer, A. Neunzert, K. Y. Ng, S. W. S. Ng, C. Nguyen, P. Nguyen, T. Nguyen, L. Nguyen Quynh, J. Ni, W-T Ni, S. A. Nichols, T. Nishimoto, A. Nishizawa, S. Nissanke, E. Nitoglia, F. Nocera, M. Norman, C. North, S. Nozaki, G. Nurbek, L. K. Nuttall, Y. Obayashi, J. Oberling, B. D. O'Brien, J. O'Dell, E. Oelker, W. Ogaki, G. Oganesyan, J. J. Oh, K. Oh, S. H. Oh, M. Ohashi, T. Ohashi, M. Ohkawa, F. Ohme, H. Ohta, M. A. Okada, Y. Okutani, C. Olivetto, K. Oohara, R. Oram, B. O'Reilly, R. G. Ormiston, N. D. Ormsby, R. O'Shaughnessy, E. O'Shea, S. Oshino, S. Ossokine, C. Osthelder, S. Otabe, D. J. Ottaway, H. Overmier, A. E. Pace, G. Pagano, R. Pagano, M. A. Page, G. Pagliaroli, A. Pai, S. A. Pai, S. Pal, J. R. Palamos, O. Palashov, C. Palomba, H. Pan, K-C Pan, P. K. Panda, P. T. H. Pang, C. Pankow, F. Pannarale, B. C. Pant, F. H. Panther, F. Paoletti, A. Paoli, A. Paolone, G. Pappas, A. Parisi, H. Park, J. Park, W. Parker, D. Pascucci, A. Pasqualetti, R. Passaquieti, D. Passuello, M. Patel, M. Pathak, B. Patricelli, A. S. Patron, S. Paul, E. Payne, M. Pedraza, R. Pedurand, M. Pegoraro, A. Pele, F. E. Pena Arellano, S. Penano, S. Penn, A. Perego, A. Pereira, T. Pereira, C. J. Perez, C. Perigois, C. C. Perkins, A. Perreca, S. Perries, D. Pesios, J. Petermann, D. Petterson, H. P. Pfeiffer, H. Pham, K. A. Pham, K. S. Phukon, H. Phurailatpam, O. J. Piccinni, M. Pichot, M. Piendibene, F. Piergiovanni, L. Pierini, V Pierro, G. Pillant, M. Pillas, F. Pilo, L. Pinard, C. Pineda-Bosque, I. M. Pinto, M. Pinto, B. J. Piotrzkowski, K. Piotrzkowski, M. Pirello, M. D. Pitkin, A. Placidi, E. Placidi, M. L. Planas, W. Plastino, C. Pluchar, R. Poggiani, E. Polini, D. Y. T. Pong, S. Ponrathnam, E. K. Porter, R. Poulton, A. Poverman, J. Powell, M. Pracchia, T. Pradier, A. K. Prajapati, K. Prasai, R. Prasanna, G. Pratten, M. Principe, G. A. Prodi, L. Prokhorov, P. Prosposito, L. Prudenzi, A. Puecher, M. Punturo, F. Puosi, P. Puppo, M. Purrer, H. Qi, N. Quartey, V Quetschke, P. J. Quinonez, R. Quitzow-James, F. J. Raab, G. Raaijmakers, H. Radkins, N. Radulesco, P. Raffai, S. X. Rail, S. Raja, C. Rajan, K. E. Ramirez, T. D. Ramirez, A. Ramos-Buades, J. Rana, P. Rapagnani, A. Ray, V Raymond, N. Raza, M. Razzano, J. Read, L. A. Rees, T. Regimbau, L. Rei, S. Reid, S. W. Reid, D. H. Reitze, P. Relton, A. Renzini, P. Rettegno, B. Revenu, A. Reza, M. Rezac, F. Ricci, D. Richards, J. W. Richardson, L. Richardson, G. Riemenschneider, K. Riles, S. Rinaldi, K. Rink, N. A. Robertson, R. Robie, F. Robinet, A. Rocchi, S. Rodriguez, L. Rolland, J. G. Rollins, M. Romanelli, R. Romano, C. L. Romel, A. Romero, I. M. Romero-Shaw, J. H. Romie, S. Ronchini, L. Rosa, C. A. Rose, M. P. Ross, S. Rowan, S. J. Rowlinson, S. Roy, Santosh Roy, Soumen Roy, D. Rozza, P. Ruggi, K. Ruiz-Rocha, K. Ryan, S. Sachdev, T. Sadecki, J. Sadiq, S. Saha, Y. Saito, K. Sakai, M. Sakellariadou, S. Sakon, O. S. Salafia, F. Salces-Carcoba, L. Salconi, M. Saleem, F. Salemi, A. Samajdar, E. J. Sanchez, J. H. Sanchez, L. E. Sanchez, N. Sanchis-Gual, J. R. Sanders, A. Sanuy, T. R. Saravanan, N. Sarin, B. Sassolas, H. Satari, O. Sauter, R. L. Savage, V Savant, T. Sawada, H. L. Sawant, S. Sayah, D. Schaetzl, M. Scheel, J. Scheuer, M. G. Schiworski, P. Schmidt, S. Schmidt, R. Schnabel, M. Schneewind, R. M. S. Schofield, A. Schonbeck, B. W. Schulte, B. F. Schutz, E. Schwartz, J. Scott, S. M. Scott, M. Seglar-Arroyo, Y. Sekiguchi, D. Sellers, A. S. Sengupta, D. Sentenac, E. G. Seo, V Sequino, A. Sergeev, Y. Setyawati, T. Shaffer, M. S. Shahriar, M. A. Shaikh, B. Shams, L. Shao, A. Sharma, P. Sharma, P. Shawhan, N. S. Shcheblanov, A. Sheela, Y. Shikano, M. Shikauchi, H. Shimizu, K. Shimode, H. Shinkai, T. Shishido, A. Shoda, D. H. Shoemaker, D. M. Shoemaker, S. ShyamSundar, M. Sieniawska, D. Sigg, L. Silenzi, L. P. Singer, D. Singh, M. K. Singh, N. Singh, A. Singha, A. M. Sintes, V Sipala, V Skliris, B. J. J. Slagmolen, T. J. Slaven-Blair, J. Smetana, J. R. Smith, L. Smith, R. J. E. Smith, J. Soldateschi, S. N. Somala, K. Somiya, I Song, K. Soni, V Sordini, F. Sorrentino, N. Sorrentino, R. Soulard, T. Souradeep, E. Sowell, V Spagnuolo, A. P. Spencer, M. Spera, P. Spinicelli, A. K. Srivastava, V Srivastava, K. Staats, C. Stachie, F. Stachurski, D. A. Steer, J. Steinlechner, S. Steinlechner, N. Stergioulas, D. J. Stops, M. Stover, K. A. Strain, L. C. Strang, G. Stratta, M. D. Strong, A. Strunk, R. Sturani, A. L. Stuver, M. Suchenek, S. Sudhagar, V Sudhir, R. Sugimoto, H. G. Suh, A. G. Sullivan, T. Z. Summerscales, L. Sun, S. Sunil, A. Sur, J. Suresh, P. J. Sutton, Takamasa Suzuki, Takanori Suzuki, Toshikazu Suzuki, B. L. Swinkels, P. Szewczyk, M. Tacca, H. Tagoshi, S. C. Tait, H. Takahashi, R. Takahashi, S. Takano, H. Takeda, M. Takeda, C. J. Talbot, C. Talbot, K. Tanaka, Taiki Tanaka, Takahiro Tanaka, A. J. Tanasijczuk, S. Tanioka, D. B. Tanner, D. Tao, L. Tao, R. D. Tapia, E. N. Tapia San Martin, C. Taranto, A. Taruya, J. D. Tasson, R. Tenorio, J. E. S. Terhune, L. Terkowski, M. P. Thirugnanasambandam, M. Thomas, P. Thomas, E. E. Thompson, J. E. Thompson, S. R. Thondapu, K. A. Thorne, E. Thrane, Shubhanshu Tiwari, Srishti Tiwari, V Tiwari, A. M. Toivonen, A. E. Tolley, T. Tomaru, T. Tomura, M. Tonelli, Z. Tornasi, A. Torres-Forne, C. Torrie, I. Tosta E. Melo, D. Toyra, A. Trapananti, F. Travasso, G. Traylor, M. Trevor, M. C. Tringali, A. Tripathee, L. Troiano, A. Trovato, L. Trozzo, R. J. Trudeau, D. Tsai, K. W. Tsang, T. Tsang, J-S Tsao, M. Tse, R. Tso, S. Tsuchida, L. Tsukada, D. Tsuna, T. Tsutsui, K. Turbang, M. Turconi, D. Tuyenbayev, A. S. Ubhi, N. Uchikata, T. Uchiyama, R. P. Udall, A. Ueda, T. Uehara, K. Ueno, G. Ueshima, C. S. Unnikrishnan, A. L. Urban, T. Ushiba, A. Utina, G. Vajente, A. Vajpeyi, G. Valdes, M. Valentini, V. Valsan, N. van Bakel, M. van Beuzekom, M. van Dael, J. F. J. van den Brand, C. Van den Broeck, D. C. Vander-Hyde, H. van Haevermaet, J. van Heijningen, M. H. P. M. van Putten, N. van Remortel, M. Vardaro, A. F. Vargas, V. Varma, M. Vasuth, A. Vecchio, G. Vedovato, J. Veitch, P. J. Veitch, J. Venneberg, G. Venugopalan, D. Verkindt, P. Verma, Y. Verma, S. M. Vermeulen, D. Veske, F. Vetrano, A. Vicere, S. Vidyant, A. D. Viets, A. Vijaykumar, V. Villa-Ortega, J-Y Vinet, A. Virtuoso, S. Vitale, H. Vocca, E. R. G. von Reis, J. S. A. von Wrangel, C. Vorvick, S. P. Vyatchanin, L. E. Wade, M. Wade, K. J. Wagner, R. C. Walet, M. Walker, G. S. Wallace, L. Wallace, J. Wang, J. Z. Wang, W. H. Wang, R. L. Ward, J. Warner, M. Was, T. Washimi, N. Y. Washington, J. Watchi, B. Weaver, C. R. Weaving, S. A. Webster, M. Weinert, A. J. Weinstein, R. Weiss, C. M. Weller, R. A. Weller, F. Wellmann, L. Wen, P. Wessels, K. Wette, J. T. Whelan, D. D. White, B. F. Whiting, C. Whittle, D. Wilken, D. Williams, M. J. Williams, A. R. Williamson, J. L. Willis, B. Willke, D. J. Wilson, C. C. Wipf, T. Wlodarczyk, G. Woan, J. Woehler, J. K. Wofford, D. Wong, I. C. F. Wong, M. Wright, C. Wu, D. S. Wu, H. Wu, D. M. Wysocki, L. Xiao, T. Yamada, H. Yamamoto, K. Yamamoto, T. Yamamoto, K. Yamashita, R. Yamazaki, F. W. Yang, K. Z. Yang, L. Yang, Y-C Yang, Y. Yang, Yang Yang, M. J. Yap, D. W. Yeeles, S-W Yeh, A. B. Yelikar, M. Ying, J. Yokoyama, T. Yokozawa, J. Yoo, T. Yoshioka, Hang Yu, Haocun Yu, H. Yuzurihara, M. Zanolin, S. Zeidler, T. Zelenova, J-P Zendri, M. Zevin, M. Zhan, H. Zhang, J. Zhang, L. Zhang, R. Zhang, T. Zhang, Y. Zhang, C. Zhao, G. Zhao, Y. Zhao, Yue Zhao, R. Zhou, Z. Zhou, X. J. Zhu, Z-H Zhu, A. B. Zimmerman, M. E. Zucker, J. Zweizig

Summary: This paper describes the first ever all-sky search for long-duration, quasimonochromatic gravitational-wave signals emitted by ultralight scalar boson clouds around spinning black holes. The study found no evidence of such signals and set upper limits on the signal strain amplitude.

PHYSICAL REVIEW D (2022)

Article Optics

Internal nonlocality in generally dilated Hermiticity

Minyi Huang, Ray-Kuang Lee

Summary: This paper discusses the internal nonlocality in a global Hermitian system when the twofold structure breaks. By introducing local measurements and investigating correlation functions, the existence of internal nonlocality is revealed, and the corresponding correlation bounds are discussed.

PHYSICAL REVIEW A (2022)

Article Nanoscience & Nanotechnology

Pattern-tunable synthetic gauge fields in topological photonic graphene

Zhen-Ting Huang, Kuo-Bin Hong, Ray-Kuang Lee, Laura Pilozzi, Claudio Conti, Jhih-Sheng Wu, Tien-Chang Lu

Summary: In this study, a straightforward and effective design approach for photonic topological insulators supporting high quality factors edge states is proposed using pattern-tunable strain-engineering. Chiral strain-engineering creates opposite synthetic gauge fields in two domains resulting in Landau levels with the same energy spacing but different topological numbers. The strain strongly affects the degree of localization of edge states, while the two-domain design stabilizes the strain-induced topological edge state, providing large scalability for various photonics applications.

NANOPHOTONICS (2022)

Article Optics

Enhanced nonlinear quantum metrology with weakly coupled solitons in the presence of particle losses

Alexander Alodjants, Dmitriy Tsarev, The Vinh Ngo, Ray-Kuang Lee

Summary: This study proposes a method for phase parameter estimation using a soliton Josephson junction system, achieving high accuracy in lossy quantum metrology. By forming entangled Fock states with minimal loss, super-Heisenberg sensitivity is realized, further improving the accuracy of phase estimation for atomic condensate solitons used in current experiments.

PHYSICAL REVIEW A (2022)

Article Chemistry, Physical

Enhancing catalytic activity of zeolitic octahedral metal oxides through zinc incorporation for ethane oxidative dehydrogenation

Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang

Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Unveiling the synergistic effect between the metallic phase and bridging S species over MoS2 for highly efficient nitrogen fixation

Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang

Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Polymethylhydrosiloxane-modified gas-diffusion cathode for more efficient and durable H2O2 electrosynthesis in the context of water treatment

Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires

Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Boron-doped rGO electrocatalyst for high effective generation of hydrogen peroxide: Mechanism and effect of oxygen-enriched air

Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun

Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Oxygen vacancies-modified S-scheme heterojunction of Bi-doped La2Ti2O7 and La-doped Bi4Ti3O12 to improve the NO gas removal avoiding NO2 product

Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou

Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Understanding the synergistic effect of hydrated electron generation from argon plasma catalysis over Bi2O3/CeO2 for perfluorooctanoic acid dehalogenation: Mechanism and DFT study

Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang

Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Ru clusters anchored on N-doped porous carbon-alumina matrix as efficient catalyst toward primary amines via reductive amination

Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding

Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Efficient 1O2 production from H2O2 over lattice distortion controlled spinel ferrites

Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang

Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Tailoring the Mo-N/Mo-O configuration in MoO2/Mo2N heterostructure for ampere-level current density hydrogen production

Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng

Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Spin state-tailored tetrahedral and octahedral cobalt centers on millimetric Co-Al oxide catalysts as dual sites for synergistic peroxymonosulfate activation

Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu

Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

Cu nanocrystals coupled with poly (heptazine imide) for synergistically enhanced photocatalytic CH3SH elimination: Facet engineering strengthened electron pump effect

Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He

Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY (2024)

Article Chemistry, Physical

NiSn intermetallic nanoparticles with geometrically isolated Ni sites for selective C-O cleavage of furfural

Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller

Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)

Article Chemistry, Physical

Nickel-facilitated in-situ surface reconstruction on spinel Co3O4 for enhanced electrochemical nitrate reduction to ammonia

Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan

Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)

Article Chemistry, Physical

Unraveling the discriminative mechanisms for peroxy activation via atomically dispersed Fe-N5 sites for tunable water decontamination

Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai

Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)

Article Chemistry, Physical

Fe-Mn oxycarbide anchored on N-doped carbon for enhanced Fenton-like catalysis: Importance of high-valent metal-oxo species and singlet oxygen

Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng

Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.

APPLIED CATALYSIS B-ENVIRONMENTAL (2024)