Issue 11, 2022

Self-driven dual hydrogen production system based on a bifunctional single-atomic Rh catalyst

Abstract

Electrocatalytic hydrogen evolution is an efficient and economical technology to address environmental contamination and energy crises, but the development of such a high-efficiency and energy-saving sustainable hydrogen production system remains a great challenge. Here, we present a novel strategy to design a self-driven dual hydrogen production system for efficient hydrogen production based on highly-dispersed single Rh atoms supported on an oxygen-functionalized Ti3C2Ox MXene (Rh-SA/Ti3C2Ox) catalyst. The bifunctional Rh-SA/Ti3C2Ox catalyst exhibits remarkable catalytic activities towards both the pH-universal hydrogen evolution reaction (HER) and hydrazine oxidation reaction (HzOR). Using Rh-SA/Ti3C2Ox as the electrode in the self-driven dual hydrogen production system by combining a Zn–H2 battery and overall hydrazine splitting units, an ultra-high H2 generation rate of 45.77 mmol h−1 can be achieved. Density functional theory calculations indicate that the atomically dispersed single Rh atoms not only make the free energy of adsorbed H (ΔG*H) more thermoneutral for the HER but also largely decrease the free-energy barrier of the dehydrogenation of adsorbed NHNH2 for the HzOR.

Graphical abstract: Self-driven dual hydrogen production system based on a bifunctional single-atomic Rh catalyst

Supplementary files

Article information

Article type
Paper
Submitted
28 aug 2021
Accepted
03 nov 2021
First published
06 nov 2021

J. Mater. Chem. A, 2022,10, 6134-6145

Self-driven dual hydrogen production system based on a bifunctional single-atomic Rh catalyst

X. Peng, Y. Mi, X. Liu, J. Sun, Y. Qiu, S. Zhang, X. Ke, X. Wang and J. Luo, J. Mater. Chem. A, 2022, 10, 6134 DOI: 10.1039/D1TA07375C

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