Review
Chemistry, Multidisciplinary
Yudong Xue, Yunting Wang, Zhenhua Pan, Kazuhiro Sayama
Summary: This paper reviews recent developments in EC/PEC H2O2 production through water oxidation, including fundamental aspects, benchmark activity evaluation, material/catalyst selection, and strategies for increasing selectivity, efficiency, and accumulation. The challenges and outlook for water oxidation in H2O2 production are also discussed, with a focus on device-level development, accumulation and stability, and industrial applications. The review aims to inspire further research in improving EC/PEC H2O2 production.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Environmental Sciences
Hyekyung Cho, Hyunku Joo, Hansung Kim, Ji-Eun Kim, Kyoung-Soo Kang, Jaekyung Yoon
Summary: Erbium-doped TiO2 nanotubes exhibit enhanced photo-conversion efficiency and catalytic activity, showing great potential in hydrogen generation and organic wastewater degradation. The study highlights the significant impact of doping conditions on the material's optical and electrical properties, demonstrating the effectiveness of the current electrochemical approach for PEC water splitting.
Article
Chemistry, Multidisciplinary
Jinshu Wang, Houyan Cheng, Yuntao Cui, Yunfei Yang, Heng He, Yongfeng Cai, Zhiliang Wang, Lianzhou Wang, Yuxiang Hu
Summary: This study reports a rapid hydrogenation method using gallium-based liquid metals to enhance fast charge separation and transfer in solar conversion processes. By embedding protons into the photoanode and utilizing the strong reduction capability of the liquid metals, the carrier concentration of the photoanode is significantly increased, resulting in improved charge separation and transfer.
Review
Chemistry, Physical
Xuan Minh Chau Ta, Rahman Daiyan, Thi Kim Anh Nguyen, Rose Amal, Thanh Tran-Phu, Antonio Tricoli
Summary: This review presents recent progress on alternative anodic choices for photoelectrochemical water splitting, discusses the benefits and issues of alternative photooxidation reactions coupled with concurrent hydrogen evolution reaction, and evaluates the challenges and opportunities of these alternative reactions for solar energy production and environmental treatment.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jie Yang, Yukun Zhao, Mengyu Duan, Chaoyuan Deng, Yufan Zhang, Yu Lei, Jikun Li, Wenjing Song, Chuncheng Chen, Jincai Zhao
Summary: In this study, the efficient dioxygenation of alkenes to diols or alpha-hydroxy ketones under mild conditions was achieved by adding bicarbonate in a heterogenous photoelectrochemical cell. The role of bicarbonate-derived radicals in the reaction was identified and a triple role mechanism was proposed.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Lixia Pan, Jiazhe Wu, Xiaoya Xu, Fei Lv, Yubin Chen, Liejin Guo
Summary: Photoelectrochemical (PEC) water splitting is a promising way to convert solar energy into hydrogen energy. This study investigated the effect of concentrated light and reaction temperature on the PEC performance of CoPi/Mo:BiVO4 photoanode, and found that concentrated light can effectively enhance the photocurrent density, with the best performance achieved at high temperature.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Liu Jing, Gao Jie, Wanqing Yu, Huanwei Ren, Xuejing Cui, Xin Chen, Luhua Jiang
Summary: In this study, a highly active and stable electrocatalyst Ru-TiO/TiO2@NC is developed for hydrogen oxidation and evolution reactions. The catalyst exhibits exceptional activity and stability, outperforming the traditional Pt/C catalyst. The unique sandwich structure and optimized interaction between Ru and TiO/TiO2 contribute to the enhanced performance of this Ru-based catalyst.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Abdul Zeeshan Khan, Ibrahim Khan, Ali Sufyan, Dalaver Anjum, Ahsanulhaq Qurashi
Summary: Hydrogen treatment activates non-photoactive nickel vanadate towards photoelectrochemical water oxidation, showing significant absorption in the visible regime and achieving an indirect bandgap value of 2.15 eV. The hydrogen-treated H-NV-500 photoanode exhibits an onset potential at around 0.74 V and a photocurrent density at saturation of about 2.13 mu A/cm(2).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Ceramics
Joao Victor Barbosa Moura, Antonio Amison Gomes de Souza, Paulo de Tarso Cavalcante Freire, Cleanio da Luz Lima, Thiago Mielle Brito Ferreira Oliveira
Summary: The study reported the structural, morphological, and optical characterization of sodium-cerium molybdate, highlighting its potential as a promising photoelectroactive material for water splitting. Experimental results showed significant photoelectroactivity of the material, with a remarkable increase in photocurrent density under irradiation. The material also exhibited high stability after on-off cycles, confirming its proper performance as a photoanode for water splitting.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Chemistry, Physical
Lihao Yu, Qijia Ding, Ying Liu, Dongtian Sun, Jinrui Ding, Guoxing Zhu, Hongye Bai, Weiqiang Fan
Summary: This study addresses the stability issue of Zn-MOF (ZIF8) by partially replacing Zn2+ ions with Ni2+ ions, resulting in the successful enhancement of the PEC efficiency and stability of TiO2-Zn MOF. The findings provide new guidance for designing highly stable photoelectrodes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Multidisciplinary
Xiaoyan Zhang, Shengqi Zhang, Xiaoli Cui, Wei Zhou, Weimin Cao, Danhong Cheng, Yi Sun
Summary: This review focuses on the application of TiO2-based photoanodes in PEC water splitting. TiO2 exhibits high PEC water splitting performance, but its performance is hindered by certain disadvantages. The review highlights the mechanisms and key factors for achieving high solar-to-hydrogen conversion efficiency, as well as controllable synthesis and modification strategies. The future trends for TiO2-based photoanodes in PEC water splitting are also discussed.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Multidisciplinary Sciences
Zhangliu Tian, Yumin Da, Meng Wang, Xinyu Dou, Xinhang Cui, Jie Chen, Rui Jiang, Shibo Xi, Baihua Cui, Yani Luo, Haotian Yang, Yu Long, Yukun Xiao, Wei Chen
Summary: Photoelectrochemical oxidation provides a promising strategy for glucaric acid production. In this work, selective oxidation of glucose to glucaric acid is realized on the photoanode of defective TiO2 decorated with single-atom Pt via a photoelectrochemical strategy. By optimizing oxygen vacancies, the defective TiO2 photoanode exhibits greatly improved charge separation, significantly enhanced selectivity, and yield of C-6 products.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Qiang Wang, Xia Ma, Ping Wu, Bing Li, Lingxia Zhang, Jianlin Shi
Summary: The study introduced a novel integrated photoanode to enhance solar energy conversion efficiency and stabilize PEC water-splitting performance. By replacing WOR with GOR, nearly 100% Faradaic efficiency was achieved for the green energy conversion.
Article
Chemistry, Physical
Gyu Yong Jang, Young Moon Choi, Seung Hun Roh, Shipeng Wan, Kan Zhang, Seok Joon Kwon, Jung Kyu Kim, Jong Hyeok Park
Summary: In this study, a plasmon-driven strategy was proposed to regulate the product selectivity of a metal oxide-based photoelectrochemical photoanode. By modulating the surface photovoltage and energy band structure of the photoanode, the plasmonic near-field effect enabled the photoinduced charge carriers to meet the thermodynamic potential required for the conversion of water oxidation reaction (WOR) from O-2 to high-value H2O2. As a result, the H2O2 Faradaic efficiency of BiVO4/Au-PAT was approximately 3.3 times higher than that of pristine BiVO4.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Isaac Holmes-Gentle, Franky E. Bedoya-Lora, Lorenzo Aimone, Sophia Haussener
Summary: Despite the potential advantages for improving the photoelectrochemical performance and system-level design, the behavior of photoelectrochemical materials under high irradiance conditions has not been studied. In this study, a high flux photoelectrochemical (HFPEC) test cell was designed and experiments were conducted using a high flux solar simulator to investigate the light-dependent behavior of two reference materials. The results revealed that bubble-induced losses and light-dependent degradation kinetics are key factors influencing the behavior of photoelectrochemical materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Ceramics
Lei Liu, Zijian Zhou, Xiangkun Elvis Cao, Yue Zhou, Dejun Peng, Ying Liu, Xiaowei Liu, Minghou Xu
Summary: Many dopants have been explored to improve the heat storage performance and sintering resistance of Co3O4, but the performance of these materials is not comparable due to different synthesis methods and test conditions. This study systematically compared and screened nine dopants, including four unreported ones, under the same conditions. The results showed that Cu and Zr doping had the highest re-oxidation rate, while Si and Mg doping had adverse effects on the conversion rate. Cu-doped sample exhibited higher re-oxidation rate and energy density, while Zr-doped sample exhibited more stable cyclability.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Jialin Wang, Yu-Cheng Huang, Yiqing Wang, Hao Deng, Yuchuan Shi, Daixing Wei, Mingtao Li, Chung -Li Dong, Hui Jin, Samuel S. Mao, Shaohua Shen
Summary: This study reveals that the d-orbital electronic configuration of nickel in Ni-N-C catalysts promotes CO2 activation and electron transfer, leading to excellent CO2 reduction to CO performance.
Editorial Material
Chemistry, Multidisciplinary
Xiangkun Elvis Cao, Gladys Chepkirui Ngetich
Summary: Two Schmidt Science Fellows share their experiences of academic and career setbacks during their PhD journeys, and provide suggestions for advisors, departments, and institutions to encourage students, especially those from underrepresented backgrounds, to openly discuss their failures.
NATURE REVIEWS CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Zheming Tong, Hao Liu, Xiangkun Elvis Cao, Dane Westerdahld, Xiaofeng Jin
Summary: Centrifugal water pumps are crucial for urban sustainability in municipal water distribution systems. Cavitation, a common phenomenon in water pumps, leads to energy inefficiency and mechanical failures. To diagnose cavitation early, a novel approach combining vibration signal-based neural network with high-speed photography was proposed, achieving over 95% diagnosis accuracy in real time.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Thermodynamics
Xin-Yuan Tang, Wei-Wei Yang, Xu Ma, Xiangkun Elvis Cao
Summary: This study proposes an integrated membrane reactor modeling method based on thermodynamic equilibrium to investigate the enhancement potential of membrane reactors. The modeling method applies MATLAB codes to calculate local reaction equilibrium and determine product separation. Through parametric analysis and optimization by GA and NSGA-II, it is found that pressure-driven hydrogen recovery enhancement is the key to improving membrane reactor performance. The results provide reference conditions for theoretical reactor design.
Article
Chemistry, Physical
Yong-Jian Yang, Wei-Wei Yang, Xu Ma, Xin-Yuan Tang, Xiangkun Elvis Cao
Summary: In order to counteract the effects of solar radiation fluctuation, phase change material (PCM) was employed in the solar volumetric reactor. A new design, SVR2, was proposed to address issues of high temperature, slow charging-discharging rate, and fluctuating methane conversion. Simulation results showed that SVR2 achieved a lower maximum temperature and higher methane conversion rate compared to the conventional SVR1 under natural solar radiation fluctuation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Mechanics
Zheming Tong, Zhongqin Yang, Shuiguang Tong, Zekui Shu, Xiangkun Elvis Cao
Summary: An enstrophy dissipation-based hybrid optimization (EDHO) approach, combining the advantages of sparrow search algorithm and Non-dominated Sorting Genetic Algorithm III (NSGA-III), was proposed to enlarge the Preferred Operating Range (POR) of a slanted axial flow pump (SAFP). The overall hydraulic performance was optimized with a special focus on energy loss mechanism. The results showed that eddy dissipation contributed the most energy loss under partial loads, while shear dissipation also played a significant role under overload conditions.
Article
Engineering, Chemical
Yubing Wang, Xiaoxi Wu, Jiarui Zhang, Zhicheng Xu, Jiangtao Feng, Mingtao Li, Jie Chen, Wei Yan
Summary: This study introduces a novel integration of a conjugated microporous polymer (CMP) material with conventional polyaniline, which achieves a synergistic effect. The resulting SD-CMPA exhibits a record-breaking maximum adsorption capacity for Hg2+, as high as 1720 mg center dot g(-1), as well as a benchmark distribution coefficient of 2.5 x 10(8) mL center dot g(-1). Moreover, it demonstrates robust reusability, retaining over 96% of its adsorption capacity for at least six cycles. The exceptional potential of SD-CMPA for high-performance environmental remediation is demonstrated in this study.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yue Zhou, Zijian Zhou, Jian Sun, Lei Liu, Fei Luo, Guorong Xu, Xiangkun Elvis Cao, Minghou Xu
Summary: This study examines the thermochemical energy storage properties of Sr3Fe2O7-delta and SrFeO3-delta, and finds that Sr3Fe2O7-delta exhibits higher reduction reaction and absorption performance, making it a better candidate for energy storage.
Article
Engineering, Environmental
Yubing Wang, Shanshan Li, Xiaoxi Wu, Jiarui Zhang, Jiangtao Feng, Mingtao Li, Shirong Zong, Wei Yan
Summary: The development of efficient adsorbents for the removal of toxic Hg(II) is crucial in environmental engineering. In this study, nitrogen-based conjugated microporous polymers (TAA, PDA, DDA) were modified with nitrogen functional groups and microporosity, resulting in ideal adsorbents for Hg(II) removal. PDA exhibited a record-breaking adsorption capacity of 1582.6 mg·g(-1), while DDA effectively reduced Hg(II) concentration to less than 0.01 ppb. The binding ability of nitrogen functional groups to mercury was found to be influenced by the specific surface area and pore size distribution of the polymers.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Mechanics
Zheming Tong, Jiage Xin, Jiaying Song, Xiangkun Elvis Cao
Summary: In this study, a GPU-accelerated deep neural network-based flow field prediction method is proposed, which achieves good experimental results in turbomachinery and shows better capability in capturing vortex structure details.
Editorial Material
Multidisciplinary Sciences
Ashley Barbara Heim, Tina Bharani, Nikos Konstantinides, Jackson Ross Powell, Sudhakar Srivastava, Xiangkun Elvis Cao, Divyansh Agarwal, Khor Waiho, Teng-Jui Lin, Edgar Virgueez, Wadim Strielkowski, Anna Uzonyi
Editorial Material
Multidisciplinary Sciences
Xiangkun Elvis Cao
Article
Chemistry, Physical
Dongyu Liu, Devan Solanki, Eli Stavitski, Mingtao Li, Shu Hu, Victor S. Batista, Ke R. Yang
Summary: This study demonstrates that alloyed TiO2 electrodes with subsurface redox-active transition metals can enable water oxidation to H2O2 at low overpotentials. The first-row transition metals (Cr, Mn, Fe, and Co) act as reservoirs of oxidizing equivalents that couple to substrate binding sites. The distinct sites for substrate binding and redox state transitions reduce the overpotential of the critical first step of water oxidation and enhance the selectivity for H2O2.
ACS APPLIED ENERGY MATERIALS
(2023)
Letter
Multidisciplinary Sciences
Nandhini Kesavan
