Article
Chemistry, Multidisciplinary
Lin Zhang, Chengjie Lu, Fei Ye, Ruilvjing Pang, Yang Liu, Zeyi Wu, Zongping Shao, Zhengming Sun, Linfeng Hu
Summary: This study presents a new approach to develop high-performance oxygen evolution electrocatalysts through vacancy engineering assisted by selenic acid etching. The Co0.85Se1-x@C nanocages prepared in this study exhibit high oxygen electrocatalytic activity at low overpotential, and require low cell voltage for full water-splitting electrolysis in alkaline media.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Huiyan Zeng, M'hamed Oubla, Xuepeng Zhong, Nicolas Alonso-Vante, Fei Du, Yu Xie, Yunhui Huang, Jiwei Ma
Summary: By introducing oxygen vacancies and fluorine anions, the catalytic activity for oxygen evolution reaction (OER) was enhanced. Theoretical calculations were consistent with experimental results, providing a pathway for designing new defective fluorinated oxides.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Yan Zhang, Fei Ye, Wei-Dong Z. Li
Summary: The self-assembled 2 D NiO/CeO2 heterostructure exhibits excellent bifunctional catalytic properties for both the HER and OER in alkaline conditions, including low onset overpotential, good durability, and large active surface area.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yihao Liu, Guanyu Chen, Riyue Ge, Ke Pei, Chenxi Song, Wenxian Li, Yingying Chen, Yuan Zhang, Lingyan Feng, Renchao Che
Summary: A sequential self-templating method was used to synthesize CoNiFe trimetallic carbonate hydroxide hierarchical hollow microflowers with oxygen vacancies. These hollow microflowers exhibited high active-site exposure density and increased electrical conductivity due to their hollow structure, Fe substitution, and V-O. The optimized trimetallic carbonate hydroxide microflowers showed excellent performance in the oxygen evolution reaction with low overpotential and Tafel slope. Theoretical calculations revealed that Fe substitution and V-O could regulate the electronic states and achieve near-ideal adsorption/desorption capacity for oxygenated intermediates. The successful synthesis of other substituted carbonate hydroxides provides a general protocol to construct transition multimetallic electrocatalysts with hollow structures for highly efficient energy conversion reactions.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Ahmed Badreldin, Aya E. Abusrafa, Ahmed Abdel-Wahab
Summary: Recent research interest has been focused on anionic point defect engineering of electrocatalytic surfaces, particularly in cobalt-based TMOs. Oxygen vacancy modulation shows promise in improving electrocatalytic activities and surface chemistry, offering potential for designing novel materials surpassing noble metal-based electrocatalysts.
Article
Chemistry, Multidisciplinary
Han Li, Shucheng Liu, Yi Liu
Summary: In this research, a series of magnetic electrocatalysts, CoNigC, were prepared successfully and it was found that an external magnetic field significantly improved the catalytic activity for the oxygen evolution under alkaline conditions. The magnetic enhancement effect on electron transfer and oxygen adsorption was attributed to spin polarization and alignment, demonstrating a promising strategy for boosting the oxygen evolution activity of magnetic electrocatalysts.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Zhi-Peng Wu, Huabin Zhang, Shouwei Zuo, Yan Wang, Song Lin Zhang, Jing Zhang, Shuang-Quan Zang, Xiong Wen (David) Lou
Summary: A highly efficient bimetallic Ni-Fe selenide-derived OER electrocatalyst is reported in this study, with the structure-activity correlation of the active centers studied. It was found that the active center located on Ni sites showed moderate bindings with oxygenous intermediates, leading to enhanced OER performance.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Yongshang Tian, Shuiyun Li, Rongqing Huang, Zhaofan Wei, Xiang Ji, Peng Liu, Yuanjian Li, Qiangshan Jing
Summary: In this study, core-branch Co3O4@CoNi-layered double hydroxide nanoarrays were developed on nickel foam as active and durable electrocatalysts for oxygen evolution reaction (OER). The optimized Co3O4@CoNi-LDH/NF showed remarkable OER performances, surpassing even the benchmark IrO2 electrocatalyst.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Hailong Li, Zhengwang Zhu, Yuanyuan Wang, Sen Chen, Chunming Liu, Haifeng Zhang
Summary: The amorphous catalysts can significantly enhance water oxidation activity through electrochemical activation, and a disordered sandwich-like multi-layer structure with abundant oxygen vacancies has been developed as an excellent electrocatalyst for the oxygen evolution reaction. This catalyst shows low overpotential and good flexibility, attributed to the synergistic effect of hybrid composition and abundant oxygen vacancies.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Yichuan Guo, Zizhen Gong, Hang Yu, Guihua Liu, Zisheng Zhang, Changcheng Wu, Jingde Li
Summary: In this study, a simple and low-cost strategy was developed to fabricate efficient OER catalysts for water electrolysis. The catalyst, with a 'nanosheets on nanowires' structure design, exhibited excellent OER activity and durability due to its increased specific surface area and more active sites.
Review
Chemistry, Physical
Saswati Santra, Verena Streibel, Ian D. Sharp
Summary: The transition from a global economy dependent on fossil fuels to one based on sustainable energy conversion technologies is the primary challenge of the day. Earth-abundant bifunctional transition metal catalysts, especially those based on molybdenum (Mo), show great promise in reducing cost, simplifying systems, and providing prospects for accelerated scaling and sustainable material reuse. This comprehensive review focuses on recent progress in Mo-based multifunctional catalysts, discussing various formations and structures, as well as emerging trends and opportunities in this promising materials space.
Article
Chemistry, Multidisciplinary
Hui Zheng, Ziwei Ma, Yunxia Liu, Yizhe Zhang, Jinyu Ye, Elke Debroye, Longsheng Zhang, Tianxi Liu, Yi Xie
Summary: In this study, an oxygen-vacancy-enriched perovskite oxide was synthesized and explored as an electrocatalyst for the NOR process. The results showed high Faradaic efficiency and yield rate, which were correlated with the amount of oxygen vacancies. Theoretical simulations revealed that the presence of oxygen vacancies can decrease the thermodynamic barrier for the NOR reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Materials Science, Multidisciplinary
Yihang Yao, Zhaoyuan Zhang, Lifang Jiao
Summary: This article summarizes the excellent performance and optimization strategies of transition metal borides (TMBs) in hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), pointing out the direction for enhancing the performance.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Khalil Ur Rehman, Shaista Airam, Xiangyun Lin, Jian Gao, Qiang Guo, Zhipan Zhang
Summary: The study proposes a facile strategy to synthesize oxygen-defect-rich Co9S8/CoO hetero-nanoparticles with a nitrogen-doped carbon shell, exhibiting excellent bifunctional catalytic activities with low overpotentials in both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The outstanding performance is attributed to the unique heterostructure and oxygen defects in the Co9S8/CoO nanoparticles, offering new insights for designing cost-effective, noble-metal-free electrocatalysts.
Article
Chemistry, Physical
Xiang Li, Wei Deng, Yun Weng, Jingjing Zhang, Haifang Mao, Wenqian Zhang, Tiandong Lu, Dewu Long, Fei Jiang
Summary: This study proposes a novel strategy to achieve high and stable hydrogen evolution reaction (HER) catalytic performance by designing flower-shaped graphene-coated trimetallic PtCoYOx @G nanoparticles and adjusting their composition ratio. The trimetallic PtCoYOx @G catalyst shows superior HER performance compared to bimetallic PtYO@G catalysts.
APPLIED CATALYSIS A-GENERAL
(2023)
