General approach to construct hierarchical-structured porous Co–Ni bimetallic oxides for efficient oxygen evolution,Inorganic Chemistry Frontiers

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General approach to construct hierarchical-structured porous Co–Ni bimetallic oxides for efficient oxygen evolution
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020-06-02 , DOI: 10.1039/d0qi00463d
Ping Li _{1,

2,

3,

4,

5} , Ran Chen _{1,

2,

3,

4,

5} , Yunan Lin _{1,

2,

3,

4,

5} , Wenqin Li _{1,

2,

3,

4,

5}

Affiliation

Exploration of highly efficient and inexpensive water oxidation electrocatalysts is of importance for promoting sustainable electrochemical energy storage and conversion technologies. Herein, we put forward a general and controllable synthetic strategy to produce a series of hierarchical-structured porous Co–Ni bimetallic oxides (CoNiO_x) via facile topochemical transformation from various Co–Ni bimetallic coordination polymers. Our newly developed protocol can realize simultaneous manipulation over the chemical composition and architectural structure, thereby achieving abundant synergistically active sites, optimized electronic configuration, and favorable mass transfer for catalysis. With the above features, the resulting CoNiO_x could manifest remarkable electrocatalytic performance towards the oxygen evolution catalysis, competing against the state-of-the-art transition metal-based catalysts reported to date and the noble metal benchmarks. This work presents a simple, yet an effective and comprehensive methodology to develop advanced noble metal-free OER electrocatalysts for future energy systems.

中文翻译：

构建分级结构的多孔Co-Ni双金属氧化物以有效释放氧气的通用方法

探索高效且廉价的水氧化电催化剂对于促进可持续的电化学能量存储和转化技术至关重要。在这里，我们提出了一种通用且可控的合成策略，通过各种Co-Ni双金属配位聚合物的简单拓扑化学转化，制备出一系列分层结构的多孔Co-Ni双金属氧化物（CoNiO _x）。我们新开发的方案可以实现化学成分和建筑结构的同时操纵，从而实现丰富的协同活性位点，优化的电子构型以及有利于催化的传质。具有以上功能，生成的CoNiO _x可以表现出卓越的对氧逸出催化的电催化性能，可与迄今报道的最先进的过渡金属基催化剂和贵金属基准竞争。这项工作为开发用于未来能源系统的高级无贵金属OER电催化剂提供了一种简单而有效的综合方法。

更新日期：2020-07-14

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