高价态W掺杂对NiFe磷化物全分解水制氢催化活性影响的研究

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (8): 1491-1499.

高价态W掺杂对NiFe磷化物全分解水制氢催化活性影响的研究

张依擎¹, 梁俊辉¹, 范浩阳², 陈达¹, 陈华予¹, 黄岳祥¹, 姚鑫³, 秦来顺¹

1.中国计量大学材料与化学学院,杭州 300018;
2.河北民族师范学院,承德 067000;
3.中国计量大学光学与电子科技学院,杭州 300018

收稿日期:2023-02-28 出版日期:2023-08-15 发布日期:2023-08-21
通信作者: 梁俊辉,博士,讲师。E-mail:nkljhyx@163.com
范浩阳,讲师。E-mail:fanhaoyang@hbun.edu.cn
秦来顺,博士,教授。E-mail:qinlaishun@cjlu.edu.cn
作者简介:张依擎(1997—),男,安徽省人,硕士研究生。E-mail:269381063@qq.com
基金资助:
浙江省省属高校基本科研业务费(2021YW35,2021YW36,2022YW62);浙江省自然科学基金(LQ23E020006);国家自然科学基金(51972294,51872271)

Effect of High-Valence State W Doping on the Catalytic Activity of NiFe Phosphides for Overall Water Splitting

ZHANG Yiqing¹, LIANG Junhui¹, FAN Haoyang², CHEN Da¹, CHEN Huayu¹, HUANG Yuexiang¹, YAO Xin³, QIN Laishun¹

1. College of Materials and Chemistry, China Jiliang University, Hangzhou 300018, China;
2. Hebei Normal University for Nationalities, Chengde 067000, China;
3. College of Optical and Electronic Technology, China Jiliang University, Hangzhou 300018, China

Received:2023-02-28 Online:2023-08-15 Published:2023-08-21

摘要/Abstract

摘要： 近年来,通过光伏辅助电催化(PV-EC)分解水制备“绿氢”成为实现碳中和目标的关键。然而,普通电解水催化剂不能满足PV-EC系统中较高的太阳能到氢能(STH)转换效率的需求。因此,获取价格低廉、低反应过电势的电催化剂材料极为重要。本文选取具有高价态的过渡金属W作为掺杂源,采用一步电沉积方法制备出NiFeW三元金属磷化物。通过一系列的表征发现,NiFeW磷化物电催化剂表现出优异的析氢反应(HER)和析氧反应(OER)活性,且作为双功能电催化剂时,在10 mA/cm²电流密度下W掺杂后样品的过电势降低了51 mV。使用NiFeW磷化物作为双功能电催化剂和太阳能电池(a-Si∶H/a-SiGe∶H/a-SiGe∶H)作为驱动源,PV-EC器件实现了超过7%的理论STH转换效率,对推动太阳能分解水制氢装置的实际应用具有重要意义。

关键词: 电解水制氢, 双功能电催化剂, 光伏辅助电催化, 太阳能电池, 过渡金属磷化物, 掺杂

Abstract: In recent years, the development of photovoltaic assisted electrocatalytic (PV-EC) water splitting has emerged as a critical issue in achieving carbon neutrality through green hydrogen evolution. However, traditional electrocatalysts do not meet the high solar-to-hydrogen (STH) conversion efficiency requirements for PV-EC systems. Therefore, it is crucial to obtain electrocatalysts with low cost and reaction overpotential. In this work, transition metal W with high valence states was employed to dope NiFe phosphide, and NiFeW ternary phosphides were prepared by a simple one-step electrodeposition method. The results indicate that NiFeW phosphide has excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities. Furthermore, when used as a bifunctional electrocatalyst, NiFeW phosphide shows a 51 mV reduction in overpotential at a current density of 10 mA/cm² compared to NiFe phosphide sample. Finally, NiFeW phosphide and a-Si∶H/a-SiGe∶H/a-SiGe∶H solar cell are employed as bifunctional electrocatalyst and driving source, respectively. The PV-EC devices achieve above 7% theoretical STH efficiency, which is significant for practical applications of solar to hydrogen devices.

Key words: electrocatalytic water splitting for hydrogen evolution, bifunctional electrocatalyst, PV-EC, solar cell, transition metal phosphide, doping

中图分类号:

张依擎, 梁俊辉, 范浩阳, 陈达, 陈华予, 黄岳祥, 姚鑫, 秦来顺. 高价态W掺杂对NiFe磷化物全分解水制氢催化活性影响的研究[J]. 人工晶体学报, 2023, 52(8): 1491-1499.

ZHANG Yiqing, LIANG Junhui, FAN Haoyang, CHEN Da, CHEN Huayu, HUANG Yuexiang, YAO Xin, QIN Laishun. Effect of High-Valence State W Doping on the Catalytic Activity of NiFe Phosphides for Overall Water Splitting[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(8): 1491-1499.

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