A Novel MoSe₂–Reduced Graphene Oxide/Polyimide Composite Film for Applications in Electrocatalysis and Photoelectrocatalysis Hydrogen Evolution

Abstract

Promising catalytic activity of MoSe2 in the hydrogen evolution reaction (HER) is synthesized on a new reduced graphene oxide/polyimide (rGO/PI) substrate by a simple electrochemical method. The MoSe2 nanoparticles have excellent photo‐responsive properties; the potential difference could reach 0.45 V with the photo‐responsive time just 0.6 s. Furthermore, MoSe2 thin film exhibits superior catalytic activity in the hydrogen evolution reaction (HER). It has a greater cathode current at more positive potential compared to other MoSe2 and MoS2, and the efficiency of H2 evolution is strongly influenced by illumination; this suggests that MoSe2 composite film has good photoelectrocatalysis properties for hydrogen evolution. Besides, both dark and illumination MoSe2 films exhibit extremely high stability in acidic solution as the HER catalytic activity shows no degradation after 100 cycles for two hours. All results indicate that MoSe2–rGO/PI composite film has potential to be a better catalyst for HER.

Unveiling the Origin of the High Catalytic Activity of Ultrathin 1T/2H MoSe2 Nanosheets for the Hydrogen Evolution Reaction: A Combined Experimental and Theoretical Study

“…In particular, MoSe 2 represents ap romising non-noble-metalbased electrocatalyst and has one of the best-known HER performance in media. [31][32][33] However,t he 1T-MoSe 2 possessing am etastable state can be readily convertedi nto the 2H-MoSe 2 phase, implying ah igh HERa ctivity but al ower stability. [31][32][33] However,t he 1T-MoSe 2 possessing am etastable state can be readily convertedi nto the 2H-MoSe 2 phase, implying ah igh HERa ctivity but al ower stability.…”

A CNT@MoSe2hybrid catalyst for efficient and stable hydrogen evolution

“…al. 31 prepared MoSe 2 on a novel reduced graphene oxide (rGO)/polyimide (PI) composite substrate by electrochemical deposition, which showed superior catalytic activity in both electrochemical and photoelectrical HER processes with high cathode current at more positive potential, excellent reversibility and stability. The small size of MoSe 2 nanoparticles and highly conductive rGO/PI substrate were claimed to be responsible for the high catalytic activity.…”

A highly flexible and conductive graphene-wrapped carbon nanofiber membrane for high-performance electrocatalytic applications

“…1 This is mainly due to its genuine advantages over other carbon materials, such as a high Young's modulus (∼1 TPa), the quantum hall effect (QHE), high carrier mobility at room temperature (∼10 000 cm 2 V −1 s −1 ), large theoretical specific surface area (2630 m 2 g −1 ), good optical transparency (∼97.7%) and excellent thermal conductivity (3000-5000 W m −1 K −1 ). [12][13][14][15] However, most of the graphene-based composites produced via hydrothermal reactions, a widely employed hybridizing method, inevitably suffer from easy aggregation and poor dispersion. Particularly, novel electrochemically active catalysts for a hydrogen evolution reaction (HER) can be synthesized utilizing graphene as a conductive support, attributing to its high surface area and strong electrical coupling effects with other HER active materials, e.g.…”