Synergistic coupling of Ni3ZnC0.7 decorated with homogeneous multimetal CoNiCuFe nitrogen-codoped carbon matrix as high-entropy catalysts for efficient overall water splitting
Synergistic coupling of Ni3ZnC0.7 decorated with homogeneous multimetal CoNiCuFe nitrogen-codoped carbon matrix as high-entropy catalysts for efficient overall water splitting
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DOI：
10.1016/j.jmst.2022.07.005
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发表时间：
2022-08
期刊：
影响因子：
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通讯作者：
Xiaotong Du;L. Yin;WenJun Zhang-;Maliang Zhang;K. Su;Zhenhuan Li
中科院分区：
文献类型：
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作者：
Xiaotong Du;L. Yin;WenJun Zhang-;Maliang Zhang;K. Su;Zhenhuan Li
过渡金属氮共掺碳化物(TM-N-C)由于其独特的电学性质和较高的催化效率，作为一种多功能的水分解电催化剂引起了人们极大的兴趣。与传统的单源修饰不同，本文报道了一种新型的多金属(铁、钴、铜、镍)氮共掺碳基质修饰的石榴状高熵Ni3ZnC0.7电催化剂(Ni3ZnC0.7@CoNiCuFe-NC)。它可以通过多金属共掺杂分子筛咪唑骨架(ZIF)的简单热退火方法来实现。在大量的Tm-N-C物种、ZIF的模板效应和独特的纳米孔结构的协同作用下，He电催化剂Ni3ZnC0.7@CoNiCuFe-NC表现出优异的电催化性能。在强碱性电解液(1.0M KOH)中，当电流密度为10 mA/cm−时，Ni3ZnC0.7@CoNiCuFe-NC的析氧反应和析氢反应的过电位分别为202mV和97mV。令人惊讶的是，作为一种双功能电极，它可以在10 mA/cm−2的电流密度下获得1.53nV的低电池电压，整体分解水，这与传统的IrO2||铂/C电极相当，优于最近报道的类似双功能催化剂。为绿色氢能行业中合理设计均匀分布的分水用TM-N-C材料提供了方向。
Due to unique electrical properties and high catalytic efficiency, transition metal nitrogen-codoped carbide (TM–N–C) has attracted tremendous interest as a multifunctional electrocatalyst for water splitting. Unlike traditional single-source modification, herein a novel pomegranate-like high-entropy (HE) electrocatalyst of Ni3ZnC0.7decorated with homogeneous multimetal (Fe, Co, Cu, and Ni) nitrogen-codoped carbon matrix (Ni3ZnC0.7@CoNiCuFe–NC) is reported. It can be implemented by the simple thermal annealing method of multimetal codoped zeolitic imidazolate framework (ZIF). Benefiting from the synergistic effects of plentiful TM–N–C species, template effect of ZIF and distinct nanoporous structure, HE electrocatalyst Ni3ZnC0.7@CoNiCuFe–NC exhibits outstanding electrocatalytic performance. When applied in strong alkaline electrolyte (1.0 M KOH), the overpotentials of Ni3ZnC0.7@CoNiCuFe–NC present as low as 202 and 97 mV for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) at 10 mA cm−2current density. Surprisingly as a bifunctional electrode, it can achieve the low cell voltage of 1.53 V at 10 mA cm−2current density for overall water splitting, which is comparable to conventional IrO2||Pt/C electrode and superior to the recently reported analogous bifunctional catalysts. Thus, the work proposes the direction for the rational design of homogeneous distribution of TM–N–C material for water splitting in the green hydrogen energy industry.