Article
Chemistry, Multidisciplinary
Jean-Felix Boue, Cedric Espinet, Simon Amigues, David Mesguich, David Cornu, Yaovi Holade, Julien Cambedouzou, Christophe Laurent
Summary: This study presents the proof-of-concept of spark plasma sintered (SPS) consolidated mesoporous composite catalytic electrodes for the electrocatalytic hydrogen evolution reaction (HER) in alkaline media. The optimized electrode exhibited stable overpotential and controllable physical and catalytic properties. This work provides a new strategy for synthesizing robust electrocatalytic electrodes for the hydrogen evolution reaction.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
JinHyok Ho, Yang Li, Yexin Dai, TongIl Kim, Jiao Wang, Jun Ren, HakSung Yun, Xianhua Liu
Summary: The CoMn2O4/NC nanocomposites were synthesized with robust electrocatalytic activity for oxygen reduction reaction. The fuel cell with CoMn2O4/NC air cathode achieved a peak power density superior to a commercial Pt/C air cathode. The use of ionic liquid as a reaction medium for catalyst preparation was demonstrated to be viable.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Lanhua Yi, Xiaoqin Peng, Xiao Ma, Yan Gao, Xianyou Wang, Yebo Lu
Summary: ZIF-derived Co, N co-doped porous carbon-supported Au nanoparticles (Au/CoNPC) were successfully synthesized via a novel pyrolysis method, with the Au/CoNPC-40 catalyst showing the highest catalytic activity for borohydride oxidation reaction. The BOR peak current density on the Au/CoNPC-40 electrode reaches up to 48.4 mA cm(-2) with a transferred electron number of up to 7.5.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Analytical
Bruna F. Gomes, Martin Prokop, Tomas Bystron, Rameshwori Loukrakpam, Carlos M. S. Lobo, Maximilian Kutter, Timon E. Guenther, Michael Fink, Karel Bouzek, Christina Roth
Summary: This study investigates the effect of H3PO4 purity on the activity of Pt/C thin film catalysts towards the oxygen reduction reaction (ORR). The results show that non-purified H3PO4 has a more negative effect on catalyst activity, attributed to the presence of H3PO3 in the non-purified H3PO4 solution. The study also demonstrates the importance of H3PO4 purity level for reliable ORR testing.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Tiago Lagarteira, Sofia Delgado, Gema P. Garcia, Alfredo Ortiz, Adelio Mendes
Summary: Graphene has been proposed as a potential support or co-support for Proton Exchange Membrane Fuel cells (PEMFCs) electrocatalysts due to its excellent properties. However, long-term stability studies on graphene-supported Oxygen Reduction Reaction (ORR) catalysts are still limited. This study aims to compare the stability of graphene and carbon black as supports for Pt/G catalysts and assess their electrochemical performance and degradation mechanisms.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Yucheng Cao, Suya Chen, Shuowen Bo, Wenjun Fan, Jiangnan Li, Chunmei Jia, Zhen Zhou, Qinghua Liu, Lirong Zheng, Fuxiang Zhang
Summary: This study reports a single-atom bismuth-decorated copper alloy catalyst that can effectively modulate the selectivity of carbon dioxide reduction to multi-carbon products. The catalyst exhibits superior performance and stability, making it a promising candidate for electrocatalytic reduction of CO2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Youngtae Park, Chang-Kyu Hwang, Kihoon Bang, Doosun Hong, Hyobin Nam, Soonho Kwon, Byung Chul Yeo, Dohyun Go, Jihwan An, Byeong-Kwon Ju, Sang Hoon Kim, Ji Young Byun, Seung Yong Lee, Jong Min Kim, Donghun Kim, Sang Soo Han, Hyuck Mo Lee
Summary: Researchers have developed a machine learning-driven catalyst screening protocol to identify ternary electrocatalysts for fuel cells that are potentially synthesizable, lower-cost, and higher-performance than conventional Pt materials. Experimental results showed that one of the final candidates, Cu3Au@Pt, outperformed Pt materials in oxygen reduction reactions. This approach demonstrates the usefulness of machine learning in exploring multicomponent systems and catalysis problems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Shuxian Di, Wenjin Liu, Chen Guo, Fanghui Wang, Anzhela Bulanova, Alexander Mebel, Hong Zhu
Summary: In this study, PtCu bimetallic nanoparticles anchored on hierarchical porous N-doped carbon were successfully fabricated, and it was found that the high surface area and mesopore ratio of N-doped carbon are beneficial for the distribution and mass transfer of PtCu particles. Furthermore, the presence of nitrogen in carbon can improve the catalytic activity by optimizing the oxygen affinity of the catalyst.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Jian Sheng, Sida Sun, Guodong Jia, Sheng Zhu, Yan Li
Summary: This research focuses on the design of single-site Fe-N-C catalysts with high bifunctional activity for oxygen reduction/evolution reactions (ORR/OER). Through additional P-doping, the catalysts exhibit improved activity by increasing active sites and optimizing oxygen adsorption. The experimental results demonstrate that the doped catalysts show excellent performance in oxygen electrocatalysis.
Article
Electrochemistry
A. R. Nallayagari, E. Sgreccia, L. Pasquini, F. Vacandio, S. Kaciulis, M. L. Di Vona, P. Knauth
Summary: B-N, Si-N, and S-N-co-doped carbon quantum dots were synthesized from inexpensive and non-toxic precursors and used as electrocatalysts for the oxygen reduction reaction. The B-N-co-doped samples showed the best electrocatalytic activity with the lowest onset and half-wave potentials, even with a low boron concentration (0.5%). The stability test demonstrated a slight decrease in the diffusion-limited current after 500 cycles. The synthesis of these co-doped carbon quantum dots from non-toxic precursors is an important advantage compared to other carbon-doped electrocatalysts.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Prateekshita Mukherjee, Indrajit Patil, Bhalchandra Kakade, Sumanta Kumar Das, Akhila Kumar Sahu, Anita Swami
Summary: The chemically ordered Pt2CoNi/C cathode catalyst with L10 ordered structure shows higher activity and stability under RDE conditions. After 60k cycles, its specific electrocatalytic activity is 3.3 times higher than Pt/C, exceeding the DOE target for MEA 2025. The synergistic effect between ordered Pt2CoNi particles and the hybrid support of Ti@C improves electrocatalytic performance and longevity under harsh acidic medium.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Noor ul Hassan, Prabhu Ganesan, Aaron A. Lando, William E. Mustain, Hector R. Colon-Mercado
Summary: Anion exchange membrane unitized regenerative fuel cells (AEM-URFCs) are a promising technology for energy storage and electricity production, but their efficiency is limited by the kinetics of the bifunctional oxygen electrode. This study advances the efficiency of the oxygen electrode by using new electrocatalysts, achieving high round trip efficiency and the highest performance reported to date in AEM-URFCs.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Analytical
Madis Lusi, Heiki Erikson, Helle -Mai Piirsoo, Paarn Paiste, Jaan Aruvali, Arvo Kikas, Vambola Kisand, Aile Tamm, Kaido Tammeveski
Summary: In this study, several bimetallic catalysts were prepared and their performance in ORR and methanol tolerance were investigated. BiPd catalyst showed superior performance in terms of MA and SA, while PbPd and SnPd catalysts exhibited relatively lower performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zihan Zhou, Liyang Xiao, Jun Zhao, Miao Zhou, Jingtong Zhang, Xiwen Du, Jing Yang
Summary: A low loaded D-Ni3.5Pd/NF catalytic electrode with abundant edge dislocations was prepared by millisecond laser direct writing in liquid nitrogen. The dense dislocations reduced hydrogen adsorption energy of Pd sites and enhanced water dissociation ability of Ni sites, leading to improved alkaline HER activity and stability.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Lalita Sharma, Nirmal Kumar Katiyar, Arko Parui, Rakesh Das, Ritesh Kumar, Chandra Sekhar Tiwary, Abhisek K. Singh, Aditi Halder, Krishanu Biswas
Summary: This study utilized CFGNZ high entropy alloy (HEA) as a low-cost electrocatalyst for OER, which showed efficient and stable characteristics after activation, highlighting its tremendous potential for applications.
