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用于电催化析氧反应的具有单层厚度空间定义良好的二维双金属聚合物
作者:小柯机器人 发布时间:2022/9/21 14:55:05

天津大学雷圣宾团队开发了用于电催化析氧反应的具有单层厚度空间定义良好的二维双金属聚合物。相关研究成果于2022年9月15日发表于国际一流学术期刊《德国应用化学》。

创新的双金属材料为进一步提高析氧反应(OER)电催化剂的性能提供了更多可能性。然而,合理设计双金属催化剂仍然是一个巨大的挑战,因为缺乏一种实用的方法将影响活性中心固有活性的因素与其他因素解耦,从而阻碍了对协同效应机理的深入理解。

该文中,研究人员提供了一种合理设计的双金属镍、钴二维聚合物模型OER催化剂。定义明确的结构、相同的活性位点密度和单层特性使研究人员能够将活性位点的固有活性与其他因素分离开来。结果表明,相对位置和局部配位环境对双金属中心的协同效应有显著影响。当过电位为500 mV时,电催化活性最高,转换频率值高达26.19 s-1

附:英文原文

Title: Spatial Well-defined Bimetallic 2D Polymers with Single Layer Thickness for Electrocatalytic Oxygen Evolution Reaction

Author: Dejuan Fa, Dingjia Wang, Xin Pan, Guangyuan Feng, Jiangyan Yuan, Qingqing Luo, Yaru Song, Xuejiao Gao, Ling Yang, Shengbin Lei, Wenping Hu, Yanhong Tao

Issue&Volume: 2022-09-15

Abstract: Innovative bimetallic materials provide more possibilities for further improving the performance of oxygen evolution reaction (OER) electrocatalyst. However, it is still a great challenge to rationally design bimetallic catalysts since there lacks a practical way to decouple the influencing factors on the intrinsic activity of active sites from others, thus hinders in-depth understanding of the mechanism of synergistic effect. Herein, we provide a rational design of bimetallic Ni, Co two-dimensional polymer model OER catalyst. The well-defined architecture, identical density of active sites and monolayer characteristic allow us to decouple the intrinsic activity of active sites from other factors. The results confirmed that the relative position and local coordination environment has significant effect on the synergistic effect of the bimetallic centres. The highest electrocatalytic activity with the turnover frequency value up to 26.19 s  1  was achieved at the overpotential of 500 mV.

DOI: 10.1002/anie.202207845

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202207845

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx