Article
Chemistry, Physical
Fangyou Meng, Yuan Yu, Dongfeng Sun, Li Li, Songmin Lin, Luo Huang, Wenhui Chu, Shufang Ma, Bingshe Xu
Summary: A novel three-dimensional flower-like tungsten phosphide nanowire arrays catalyst in-situ grown on nickel foam was explored. The 3D nanostructured electrode showed excellent electrocatalytic performance and great application prospect in electrolysis of water to produce large-scale hydrogen and oxygen.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Raul A. Marquez, Kenta Kawashima, Yoon Jun Son, Roger Rose, Lettie A. Smith, Nathaniel Miller, Omar Ali Carrasco Jaim, Hugo Celio, C. Buddie Mullins
Summary: This study investigates the impact of electrode and surface design on the performance of water electrolysis by modifying extrinsic electrode properties and studying bubble release effects. Robust and cost-effective electrodes are fabricated through 3D printing and metal deposition. The results demonstrate that modifying electrode geometry, size, and electrolyte flow rate can decrease overpotential and result in different bubble diameters and lifetimes. The suitability and stability of ordered, Ni-coated 3D porous structures are also confirmed. Additionally, this study demonstrates the effectiveness of 3D-printed electrodes for testing electrocatalytic materials while extrinsic properties are controlled.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Fasong Yang, Zhengang Guo, Bo Zhang, E. Lei
Summary: The Co3O4/CuO composite nanowire array efficiently improves both HER and OER reactions, providing numerous reactive sites on the electrode surface for water splitting.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Anirudha Shekhawat, Rajib Samanta, Sudip Barman
Summary: Researchers synthesized a porous and interfaces-rich Fe3O4/RuO2-C composite catalyst from Metal organic frameworks (MOF) material, showing excellent oxygen evolution and hydrogen evolution reaction activity and stability in alkaline media.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dan Xiang, Zefa Qin, Yi Gan, Xiangyu Luo, Xinyue Li, Liwen Hu, Yuntao Xin, Xuewei Lv, Meilong Hu, Shuqiang Jiao
Summary: In this study, a novel self-supported NiS/Ni3S2/CeO2 composite heterostructure electrocatalyst was proposed, which exhibited remarkable catalytic activity with low overpotential and good stability. The synergistic effect of oxygen vacancies and hetero-junction engineering in catalysts was systematically investigated, providing a reliable strategy to fabricate highly efficient and cost-effective electrocatalysts for overall water splitting.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Zizheng Zhu, Kai Xu, Wen Guo, Hongyan Zhang, Xin Xiao, Maoshuai He, Tingting Yu, Hong Zhao, Dongen Zhang, Tao Yang
Summary: Researchers have reported a Co-VOx-P nanoflower electrocatalyst with excellent catalytic performance for water splitting. Experimental and theoretical studies suggest that the catalyst has enhanced conductivity, facile electron transfer, and favorable surface adsorption strength.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Hedong Chen, Peng Wang, Xingyu Wang, Xingfu Wang, Lujia Rao, Yinping Qian, Hongjie Yin, Xianhua Hou, Huapeng Ye, Guofu Zhou, Richard Notzel
Summary: This study explores III-nitride nanowire anti-reflection structures for solar water splitting. Vertical InGaN nanowire arrays tilted by 73 degrees exhibit maximized photocurrent. By growing 3D InGaN nanowire arrays on inclined pyramid-textured Si, various light trapping effects lead to 500% enhancement in photocurrent compared to NWs on a planar Si substrate.
Article
Chemistry, Multidisciplinary
Biao Deng, Jie Liang, Luchao Yue, Tingshuai Li, Qian Liu, Yang Liu, Shuyan Gao, Abdulmohsen Ali Alshehri, Khalid Ahmed Alzahrani, Yonglan Luo, Xuping Sun
Summary: This research fabricates CoFe-layered double hydroxide (LDH) nanowire arrays on graphite felt (CoFe-LDH/GF) through a hydrothermal method, producing a high-performance non-noble-metal oxygen evolution reaction (OER) electrocatalyst with excellent catalytic activity, low overpotential, and electrochemical durability, providing new possibilities for the development of attractive catalyst supports for oxygen evolution applications.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Chaoxin Yang, Kai Dong, Longcheng Zhang, Xun He, Jie Chen, Shengjun Sun, Meng Yue, Hui Zhang, Min Zhang, Dongdong Zheng, Yongsong Luo, Binwu Ying, Qian Liu, Abdullah M. Asiri, Mohamed S. Hamdy, Xuping Sun
Summary: We report a high-performance and stable seawater splitting electrocatalyst, Fe-NiS/NF, which consists of iron-doped NiS nanosheet array on Ni foam. This catalyst exhibits low overpotentials of 420 and 270 mV for oxygen evolution and hydrogen evolution reactions, respectively, in alkaline seawater. The two-electrode electrolyzer using this catalyst requires a cell voltage of 1.88 V for 1000 mA cm-2 and demonstrates excellent long-term electrochemical durability for 50 hours in alkaline seawater. In situ electrochemical Raman and infrared spectroscopy were employed to study the reconstitution process of NiOOH and the generation of oxygen intermediates under reaction conditions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Liya Fan, Jaka Sunarso, Xiao Zhang, Xianqiang Xiong, Li He, Lixia Luo, Fangling Wang, Ziwei Fan, Chenglin Wu, Deman Han, Ngie Hing Wong, Yong Wang, Guihua Chen, Wei Chen
Summary: This study addresses the performance challenge of coupling CuWO4 with an electrocatalyst. By coupling it with NiWO4, the composite exhibits high electrocatalytic activity and excellent photostability. The composite also shows a negative shift in onset potential and a higher photocurrent density compared to the pure CuWO4 photoanode.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Shuting Wen, Jun Huang, Tongtong Li, Wei Chen, Guangliang Chen, Qing Zhang, Xianhui Zhang, Qinyu Qian, Kostya (Ken) Ostrikov
Summary: In this study, a hybrid nanowire-nanosheet structure made of cerium oxide and nickel-cobalt phosphide (CeO2-NiCoPx) compound was in situ engineered on Ni-Co foam (CeO2-NiCoPx/NCF) for efficient and robust water splitting. The synthesized CeO2-NiCoPx/NCF catalyst exhibited excellent catalytic activity and durability for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Lili Zhang, Yuanting Lei, Wenjing Xu, Dan Wang, Yafei Zhao, Wenxing Chen, Xu Xiang, Xinchang Pang, Bing Zhang, Huishan Shang
Summary: In this study, a highly active and durable N-CoP/CeO2 nanowire heterostructure electrocatalyst was developed, showing excellent catalytic activity for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The N-CoP/CeO2 catalyst exhibited low overpotentials of 215 and 74 mV at 10 mA cm-2 in 1.0 M KOH. The assembled water electrolyzer with N-CoP/CeO2 displayed super stability, maintaining 95.9% catalytic activity over 42 days at 1.52 V@10 mA cm-2. Theoretical calculations revealed that the metallic heterostructure interfaces of N-CoP/CeO2 enhanced the electrocatalytic activity through fast electron transfer and optimized adsorption/desorption processes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yan Dong, Zhiping Deng, Zhixiao Xu, Guangyi Liu, Xiaolei Wang
Summary: Bifunctional CoO/CoP heterojunctions with hierarchical structure were designed as efficient bifunctional electrocatalysts for overall water splitting. The unique microstructure combining two-dimensional nanosheets with one-dimensional nanowires results in exposed active sites, shortened ion-diffusion pathways, and enhanced conductivity, significantly improving performance. These freestanding electrodes exhibit high current density and excellent durability for both hydrogen and oxygen evolution reactions. A significantly high current density was achieved at a low cell voltage, indicating the potential for practical applications in water splitting.
Article
Chemistry, Multidisciplinary
Leyla Najafi, Reinier Oropesa-Nunez, Sebastiano Bellani, Beatriz Martin-Garcia, Lea Pasquale, Michele Serri, Filippo Drago, Jan Luxa, Zdenek Sofer, David Sedmidubsky, Rosaria Brescia, Simone Lauciello, Marilena Zappia, Dipak Shinde, Liberato Manna, Francesco Bonaccorso
Summary: The research focuses on synthesizing metallic rutile VO2 (VO2 (R)) nanosheets by topochemical transforming liquid-phase exfoliated VSe2, resulting in 2D non-layered materials with porous morphology and high catalytic activity for water splitting reactions in both acidic and alkaline media.
Article
Chemistry, Physical
Qing Zhou, Guanying Song, Jiachen Zou, Siqi Luo, Alan Meng, Zhenjiang Li
Summary: Exploring high-performance non-noble metal electrocatalysts, this study successfully constructed Cr-doped Ni3FeN/Ni heterostructure supported on N-doped graphene tubes, which exhibited superior bifunctional electrocatalytic performances. The Cr doping modulated the electronic structure, induced nitrogen vacancies, and the in-grown heterointerface induced charge redistribution and enhanced catalytic activity. The N-GTs skeleton improved electron and mass transfer. The designed Cr-Ni3FeN/Ni@N-GTs showed outstanding electrocatalytic properties for alkaline overall water splitting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
