Synergistic effects of 1T-2H MoS2 and laser-reduced graphene Oxide-ZnO scaffold composite catalyst for efficient hydrogen evolution reaction

K. S. Chandrakantha; Z. Zuo; B. N. Chandrashekar; A. Amini; K. S. Rangappa; S. Srikantaswamy; C. Cheng

doi:10.1016/j.mtener.2024.101683

Synergistic effects of 1T-2H MoS2 and laser-reduced graphene Oxide-ZnO scaffold composite catalyst for efficient hydrogen evolution reaction

K. S. Chandrakantha, Z. Zuo, B. N. Chandrashekar, A. Amini, K. S. Rangappa, S. Srikantaswamy, C. Cheng

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A composite catalyst, zinc-doped laser-reduced graphene oxide (LrGO), is synthesized with highly dispersed molybdenum disulfide (MoS2) nanolayers using laser exfoliation followed by a hydrothermal process. The resultant LrGO-ZnO/1T-2H MoS2 (GZM3) catalyst exhibits enhanced hydrogen evolution reaction (HER) catalytic performance and improved stability. It achieves small overpotentials of 94 and 191.5 mV at a current density of 10 mA cmâˆ’2, under acidic and alkaline conditions, respectively. This superior catalytic activity is attributed to the high electrical conductivity and large electrochemical surface area of graphene, along with efficient charge transfer facilitated by Zn ions between LrGO-ZnO and 1T-2H MoS2.

Original language	English
Article number	101683
Journal	Materials Today Energy
Volume	45
DOIs	https://doi.org/10.1016/j.mtener.2024.101683
Publication status	Published - Oct 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

2D materials
Alkaline HER
Charge transfer
Energy conversion
Hydrothermal synthesis
Water splitting

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.mtener.2024.101683

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title = "Synergistic effects of 1T-2H MoS2 and laser-reduced graphene Oxide-ZnO scaffold composite catalyst for efficient hydrogen evolution reaction",

abstract = "A composite catalyst, zinc-doped laser-reduced graphene oxide (LrGO), is synthesized with highly dispersed molybdenum disulfide (MoS2) nanolayers using laser exfoliation followed by a hydrothermal process. The resultant LrGO-ZnO/1T-2H MoS2 (GZM3) catalyst exhibits enhanced hydrogen evolution reaction (HER) catalytic performance and improved stability. It achieves small overpotentials of 94 and 191.5 mV at a current density of 10 mA cm{\^a}ˆ{\textquoteright}2, under acidic and alkaline conditions, respectively. This superior catalytic activity is attributed to the high electrical conductivity and large electrochemical surface area of graphene, along with efficient charge transfer facilitated by Zn ions between LrGO-ZnO and 1T-2H MoS2.",

keywords = "2D materials, Alkaline HER, Charge transfer, Energy conversion, Hydrothermal synthesis, Water splitting",

author = "Chandrakantha, {K. S.} and Z. Zuo and Chandrashekar, {B. N.} and A. Amini and Rangappa, {K. S.} and S. Srikantaswamy and C. Cheng",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Ltd",

year = "2024",

month = oct,

doi = "10.1016/j.mtener.2024.101683",

language = "English",

volume = "45",

journal = "Materials Today Energy",

issn = "2468-6069",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Synergistic effects of 1T-2H MoS2 and laser-reduced graphene Oxide-ZnO scaffold composite catalyst for efficient hydrogen evolution reaction

AU - Chandrakantha, K. S.

AU - Zuo, Z.

AU - Chandrashekar, B. N.

AU - Amini, A.

AU - Rangappa, K. S.

AU - Srikantaswamy, S.

AU - Cheng, C.

PY - 2024/10

Y1 - 2024/10

N2 - A composite catalyst, zinc-doped laser-reduced graphene oxide (LrGO), is synthesized with highly dispersed molybdenum disulfide (MoS2) nanolayers using laser exfoliation followed by a hydrothermal process. The resultant LrGO-ZnO/1T-2H MoS2 (GZM3) catalyst exhibits enhanced hydrogen evolution reaction (HER) catalytic performance and improved stability. It achieves small overpotentials of 94 and 191.5 mV at a current density of 10 mA cmâˆ’2, under acidic and alkaline conditions, respectively. This superior catalytic activity is attributed to the high electrical conductivity and large electrochemical surface area of graphene, along with efficient charge transfer facilitated by Zn ions between LrGO-ZnO and 1T-2H MoS2.

AB - A composite catalyst, zinc-doped laser-reduced graphene oxide (LrGO), is synthesized with highly dispersed molybdenum disulfide (MoS2) nanolayers using laser exfoliation followed by a hydrothermal process. The resultant LrGO-ZnO/1T-2H MoS2 (GZM3) catalyst exhibits enhanced hydrogen evolution reaction (HER) catalytic performance and improved stability. It achieves small overpotentials of 94 and 191.5 mV at a current density of 10 mA cmâˆ’2, under acidic and alkaline conditions, respectively. This superior catalytic activity is attributed to the high electrical conductivity and large electrochemical surface area of graphene, along with efficient charge transfer facilitated by Zn ions between LrGO-ZnO and 1T-2H MoS2.

KW - 2D materials

KW - Alkaline HER

KW - Charge transfer

KW - Energy conversion

KW - Hydrothermal synthesis

KW - Water splitting

UR - http://www.scopus.com/inward/record.url?scp=85203662660&partnerID=8YFLogxK

U2 - 10.1016/j.mtener.2024.101683

DO - 10.1016/j.mtener.2024.101683

M3 - Article

AN - SCOPUS:85203662660

SN - 2468-6069

VL - 45

JO - Materials Today Energy

JF - Materials Today Energy

M1 - 101683

ER -

Synergistic effects of 1T-2H MoS2 and laser-reduced graphene Oxide-ZnO scaffold composite catalyst for efficient hydrogen evolution reaction

Abstract

Bibliographical note

Keywords

UN SDGs

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