Self‐Supporting and Shell‐Core Pd−Ni@Ni Nanowire Arrays Electrode as Anode of Direct Carbohydrazide Fuel Cell

Abstract Considering the excessively high onset potential on pure Ni catalyst and the generation of gaseous products in carbohydrazide (CHZ) electrooxidation, a self‐supporting and shell‐core Pd−Ni@Ni nanowire arrays (NAs) catalytic electrode is prepared by the first templating electrodeposition of...

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Bibliographic Details
Main Authors: Chao Peng, Shuai Hou, Prof. Lan Yuan, Prof. Yi Liu, Prof. Fen Guo
Format: Article
Language:English
Published: Wiley-VCH 2023-03-01
Series:ChemElectroChem
Subjects:
Online Access:https://doi.org/10.1002/celc.202201007
Description
Summary:Abstract Considering the excessively high onset potential on pure Ni catalyst and the generation of gaseous products in carbohydrazide (CHZ) electrooxidation, a self‐supporting and shell‐core Pd−Ni@Ni nanowire arrays (NAs) catalytic electrode is prepared by the first templating electrodeposition of Ni and the subsequent galvanic replacement of Pd. The introduction of Pd with minute mass loadings of 2.7–5.3 μg cm−2 enables a negative shift of onset potential of CHZ electrooxidation by 320 mV regardless of Ni supports. Pd in Ni@Pd−Ni NAs electrode can facilitate the chemical dissociation of CHZ into N2H4 and/or H2 and then provoke the occurrence of side reactions, i. e., N2H4 and/or H2 electrooxidation. The direct CHZ fuel cell made of Ni@Pd−Ni NAs anode delivers an open circuit voltage of 1.05 V and a peak power density of 22.90 mV cm−2 at the operating temperature of 303 K.
ISSN:2196-0216