Construction of Ru/MnO–Mn7C3/N-doped carbon sheets for boosting electrocatalytic hydrogen generation

Suffering from their low conductivity, Mn-base oxides are commonly inactive in H–OH activation. Generally, tailoring the coordinate environment of materials could induce variation in the atomic arrangement and further influence their chemical activity. Herein, we propose a feasible strategy to media...

Full description

Saved in:
Bibliographic Details
Published in:International journal of hydrogen energy 2024-11, Vol.89, p.453-461
Main Authors: Yan, Zhibo, Tao, Yixuan, Liu, Guangrui, Yin, Jie, Li, Juan, Wang, Wenpin, Wu, Jie, Li, Zhongcheng
Format: Article
Language:English
Subjects:
Interface structure
MnO–Mn7C3
N-doped carbon
Seawater electrolysis
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Suffering from their low conductivity, Mn-base oxides are commonly inactive in H–OH activation. Generally, tailoring the coordinate environment of materials could induce variation in the atomic arrangement and further influence their chemical activity. Herein, we propose a feasible strategy to mediate the electronic structure of Mn-based oxides by facile hydrothermal method and thermal reduction route. Compared with MnO2 sheets, the as-synthesized Ru/MnO–Mn7C3/N-doped carbon sheets (Ru/MnO–Mn7C3/NC) exhibit the higher activity for both acidic (73 mV) and alkaline water reduction reaction (44 mV@10 mA/cm2). Benefitting from unique structures, Ru/MnO–Mn7C3/NC sheets show the better freshwater/seawater oxidation reactivity, exceeding RuO2. The strong interaction of MnO–Mn7C3 heterostructures, Ru, and N-doped carbon endows Ru/MnO–Mn7C3/NC with the good freshwater and seawater dissociation performance, outperforming most of the reported Mn-based oxides. Ru/MnO–Mn7C3/N-doped carbon sheets could considerably catalyze dissociation of freshwater/seawater into H2 with 1.52/1.65V at 10 mA/cm2. [Display omitted] •Ru/MnO–Mn7C3/N-doped carbon sheets are rationally fabricated.•Ru, MnO–Mn7C3 heterojunction, and N-doped carbon are observed.•It achieves high acidic and alkaline hydrogen generation efficiency.•It possesses the pronounced freshwater/seawater electrolysis reactivity.
ISSN:0360-3199
DOI:10.1016/j.ijhydene.2024.09.362