Issue 1, 2023

Facile surface reconstructions of cobalt–copper phosphide heterostructures enable efficient electrocatalytic glycerol oxidation for energy-saving hydrogen evolution

Abstract

The glycerol oxidation reaction (GOR) affords an energetically more favorable route for assisted H2 production compared to the oxygen evolution reaction, with concurrent anodic value-added chemical generation. Herein, a self-supported CoP–Cu3P composite on carbon cloth (CoP–Cu3P/CC) has been fabricated, which exhibits excellent activity toward the GOR, requiring a low applied potential of 1.13 V (vs. reversible hydrogen electrode) to reach 10 mA cm−2. Through combined surface elemental analysis, cyclic voltammetry, and in situ Raman spectroscopy characterizations, we reveal that metal elements in the mixed phosphide phases interact synergistically, leading to facilitated surface reconstruction and improved electrochemical activity. We further develop an electrolytic cell where the GOR is paired with the hydrogen evolution reaction using CoP–Cu3P/CC as both the anode and cathode, which only needs the application of 1.21 V to reach a geometric current density of 10 mA cm−2. This work provides a facile strategy to couple glycerol upgrading in an energy-saving water electrolysis system.

Graphical abstract: Facile surface reconstructions of cobalt–copper phosphide heterostructures enable efficient electrocatalytic glycerol oxidation for energy-saving hydrogen evolution

Supplementary files

Article information

Article type
Paper
Submitted
14 nov 2022
Accepted
12 dec 2022
First published
12 dec 2022
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2023,2, 161-169

Facile surface reconstructions of cobalt–copper phosphide heterostructures enable efficient electrocatalytic glycerol oxidation for energy-saving hydrogen evolution

Z. Xie, K. Wang, Y. Zou, G. Ying and J. Jiang, Energy Adv., 2023, 2, 161 DOI: 10.1039/D2YA00311B

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