In Situ Growth of Ni2P-Cu3P Bimetallic Phosphide with Bicontinuous Structure on Self-Supported NiCuC Substrate as an Efficient Hydrogen Evolution Reaction Electrocatalyst
In Situ Growth of Ni2P-Cu3P Bimetallic Phosphide with Bicontinuous Structure on Self-Supported NiCuC Substrate as an Efficient Hydrogen Evolution Reaction Electrocatalyst
复制标题
自支撑 NiCuC 基底上原位生长双连续结构 Ni2P-Cu3P 双金属磷化物作为高效析氢反应电催化剂
DOI：
10.1021/acscatal.9b00494
复制
发表时间：
2019
期刊：
影响因子：
12.9
通讯作者：
Suib Steven L
中科院分区：
文献类型：
--
作者：
Yu Linping;Zhang Jian;Dang Yanliu;He Junkai;Tobin Zachary;Kerns Peter;Dou Yuhai;Jiang Yao;He Yuehui;Suib Steven L
提出了一种制备相组成和分布可控的Ni2P-Cu3P双金属磷化物用于催化析氢反应的直接有效方法。与先前报道的前驱体不同，本文采用粉末冶金法制备了一种含有石墨碳（NiCuC）的多孔Ni - Cu合金，由于前驱体的高孔隙率和可调的Ni/Cu比，生成的Ni2P - Cu3P@NiCuC具有分层多孔结构和可控制的相组成。当Cu的最佳含量为30.0 wt %时，由于不同金属磷化位点之间的协同作用和促进了质量的传输，该催化剂表现出最高的催化活性。同时，密度泛函理论（DFT）计算表明，Ni2P-Cu3P的原子相互作用大大降低了HER催化活性增强的激活势垒。粉末冶金技术为双金属磷化物电催化剂的设计提供了一种新的途径。
A direct and effective approach is proposed to fabricate bimetallic phosphide Ni2P–Cu3P with controllable phase composition and distribution for catalytic hydrogen evolution reaction (HER). Unlike previously reported precursors, a porous Ni–Cu alloy incorporated with graphitic carbon (NiCuC) prepared via powder metallurgy is employed herein, and the generated Ni2P–Cu3P@NiCuC possesses a hierarchical porous structure and controllable phase composition due to the high porosity and tunable Ni/Cu ratio of the precursor. With an optimal Cu content of 30.0 wt %, the catalyst demonstrates the highest catalytic activity due to a synergistic interaction between different metallic phosphide sites and the facilitated mass transport. Meanwhile, density functional theory (DFT) calculation reveals that the atomic interaction of Ni2P–Cu3P substantially lower the activation barrier for enhanced HER catalytic activity. The powder metallurgy provides an approach for the design of bimetallic phosphide electrocatalysts for HER and other catalytic applications.