A bio-inspired strategy for enhanced hydrogen evolution: carbonate ions as hole vehicles to promote carrier separation

Nanoscale ◽  
2019 ◽  
Vol 11 (24) ◽  
pp. 11451-11456 ◽  
Author(s):  
Tiening Tan ◽  
Jingjing Xie ◽  
Wenxuan Wang ◽  
Hang Ping ◽  
Peiyan Ma ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Photocatalytic Hydrogen Evolution ◽  
Carbonate Ions ◽  
Carrier Separation

Carbonate ions could serve as hole vehicles to promote photo-generated carrier separation, thus improving the photocatalytic hydrogen evolution performance.

Aromatic ring substituted g-C3N4for enhanced photocatalytic hydrogen evolution

2017 ◽  
Vol 5 (33) ◽  
pp. 17199-17203 ◽  
Author(s):  
Yu Yu ◽  
Wei Yan ◽  
Wenyu Gao ◽  
Pei Li ◽  
Xiaofang Wang ◽  
...  
Keyword(s):  
Absorption Band ◽  
Band Structure ◽  
Hydrogen Evolution ◽  
Aromatic Ring ◽  
Light Absorption ◽  
Evolution Rate ◽  
Photocatalytic Hydrogen Evolution ◽  
Hydrogen Evolution Rate ◽  
Carrier Separation

An all-carbon aromatic ring substitutionally doped g-C3N4was synthesized with greatly enhanced light absorption, band structure and carrier separation, achieving a 3 times higher hydrogen evolution rate (HER).

The synergistic role of double vacancies within AgGaS2 nanocrystals in carrier separation and transfer for efficient photocatalytic hydrogen evolution

2019 ◽  
Vol 9 (20) ◽  
pp. 5838-5844 ◽  
Author(s):  
Hanying Wu ◽  
Xiao Li ◽  
Yao Cheng ◽  
Yihong Xiao ◽  
Qingping Wu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Evolution ◽  
Transfer Efficiency ◽  
Photocatalytic Hydrogen Evolution ◽  
Carrier Separation

The double vacancies synergistically contribute to photocatalytic activity by affecting the separation and transfer efficiency of photo-generated carriers.

scholarly journals Effect of anisotropic conductivity of Ag2S-modified ZnmIn2S3+m (m = 1, 5) on the photocatalytic properties in solar hydrogen evolution

RSC Advances ◽  
2021 ◽  
Vol 11 (43) ◽  
pp. 26908-26914
Author(s):  
Jingyuan Liu ◽  
Xinyi Xue ◽  
Xin Zhou ◽  
Gang Chen ◽  
Wei Liu
Keyword(s):  
Transport Property ◽  
Hydrogen Evolution ◽  
Carrier Transport ◽  
Bulk Carrier ◽  
Solar Hydrogen ◽  
Anisotropic Conductivity ◽  
Photocatalytic Hydrogen Evolution ◽  
Separation Rate ◽  
Carrier Transport Property ◽  
Carrier Separation

The anisotropic carrier transport property of Ag2S/Zn5In2S8 is substantially stronger than that of Ag2S/ZnIn2S4, resulting in higher bulk carrier separation rate and photocatalytic hydrogen evolution performance of Ag2S/Zn5In2S8.

Semiconductor Photocatalysts for Solar-to-Hydrogen Energy Conversion: Recent Advances of CdS

2020 ◽  
Vol 16 ◽  
Author(s):  
Yuxue Wei ◽  
Honglin Qin ◽  
Jinxin Deng ◽  
Xiaomeng Cheng ◽  
Mengdie Cai ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Noble Metals ◽  
Light Irradiation ◽  
Photocatalytic Hydrogen Evolution ◽  
Theoretical Design ◽  
Recent Developments

Introduction: Solar-driven photocatalytic hydrogen production from water splitting is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. In this review, recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. In particular, the factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Background: Photocatalytic hydrogen evolution from water splitting using photocatalyst semiconductors is one of the most promising solutions to satisfy the increasing demands of a rapidly developing society. CdS has emerged as a representative semiconductor photocatalyst due to its suitable band gap and band position. However, the poor stability and rapid charge recombination of CdS restrict its application for hydrogen production. The strategy of using a cocatalyst is typically recognized as an effective approach for improving the activity, stability, and selectivity of photocatalysts. Methods: This review summarizes the recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation. Results: Recent developments in CdS cocatalysts for hydrogen production from water splitting under visible-light irradiation are summarized. The factors affecting the photocatalytic performance and new cocatalyst design, as well as the general classification of cocatalysts, are discussed, which includes a single cocatalyst containing noble-metal cocatalysts, non-noble metals, metal-complex cocatalysts, metal-free cocatalysts, and multi-cocatalysts. Finally, future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are described. Conclusion: The state-of-the-art CdS for producing hydrogen from photocatalytic water splitting under visible light is discussed. The future opportunities and challenges with respect to the optimization and theoretical design of cocatalysts toward the CdS photocatalytic hydrogen evolution are also described.

Tuning of the Oxygen Species Linker on the Surface of Polymeric Carbon Nitride to Promote the Photocatalytic Hydrogen Evolution Performance

ChemSusChem ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3605-3613 ◽  
Author(s):  
Qin Lei ◽  
Rongzhi Chen ◽  
Yurong Zhao ◽  
Huanyu Chen ◽  
Xinxin Long ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Oxygen Species ◽  
Photocatalytic Hydrogen Evolution ◽  
Polymeric Carbon
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