Article
Green & Sustainable Science & Technology
Qinggang Du, Panpan Su, Zezhong Cao, Jie Yang, Cameron Alexander Hurd Price, Jian Liu
Summary: This study successfully prepared N and Fe co-doped CoO nanoparticles with high OER activity at low cost, originating from oxygen vacancies and interface effects, providing new insights into the active sites of Co-based catalysts.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2021)
Article
Engineering, Environmental
Kaiqing Dai, Ning Zhang, Lili Zhang, Linxin Yin, Yafei Zhao, Bing Zhang
Summary: A non-noble metal-based bifunctional electrocatalyst Co/CoO@NC@CC has been designed and synthesized for boosting both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) simultaneously, showing superior activities and stability in overall water splitting. The catalyst exhibits efficient electron transfer, low overpotentials, and only requires a small cell voltage for driving water splitting, making it a promising candidate for practical applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Xiaoyang Cheng, Jian Yang, Wei Yan, Yu Han, Ximing Qu, Shuhu Yin, Chi Chen, Ruiyi Ji, Yanrong Li, Guang Li, Gen Li, Yanxia Jiang, Shigang Sun
Summary: A novel strategy was developed to enhance the ORR activity of Co single-atom catalysts by introducing a deformed CoN4 site and Co nanoparticle-CoN4 composite sites, which effectively replenished the total density of CoN4. The resulting concave nanocube-like catalyst exhibited excellent ORR performance and high power density in acidic media, with theoretical studies confirming the enhanced O-2 activation and reduced carbon layer erosion. This research not only provides a new approach to develop ORR catalysts, but also contributes to a deeper understanding of ORR fundamentals.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Engineering, Environmental
Xupo Liu, Yunpeng Liu, Cuicui Zhang, Ye Chen, Guanyu Luo, Zhitao Wang, Deli Wang, Shuyan Gao
Summary: Regulating pore architecture and electronic structure is important for enhancing the oxygen electrocatalytic activity of M-N-C catalysts. In this study, N, S co-doped hollow carbon nanocages confined Fe, Co bimetallic sites (FeCo-NS-HNCs) were fabricated through a surface bridging strategy. The synergy between metal sites and N, S co-doping improved the adsorption/desorption characteristics of M-Nx sites and the Kirkendall effect facilitated the construction of hollow carbon nanocages, leading to excellent bifunctional oxygen electrocatalytic activity of FeCo-NS-HNCs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Mengjin Wen, Zihan Li, Rui Wang, Zhengmin Li, Xin Liu, Guixue Wang, Guangwen Xie, Luhua Jiang
Summary: A new type of superior activity and highly cost-effective amorphous electrocatalyst Co-Mo-Fe on nickel foam supports was prepared by facile one-step rapid electrodeposition. The doping of Fe significantly improved the oxygen evolution capacity of the Co-Mo-Fe system, and the synergistic effect of the three metals and the doping of the third metal iron increased the oxygen evolution active sites of the whole system significantly.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Youngkwang Kim, Mohanraju Karuppannan, Dohyeon Lee, Hyo Eun Bae, Quang Thien Luong, Sun Young Kang, Yung-Eun Sung, Yong-Hun Cho, Oh Joong Kwon
Summary: Fe, Ni, and Co and their alloys are widely studied for oxygen and hydrogen generation in alkaline electrocatalytic water splitting. Pentlandite sulfide has been found to enhance catalytic activity. This study successfully synthesized Fe, Ni, and Co pentlandite sulfide and compared their structural characteristics and electrochemical activity, revealing that activity depends on structural parameters.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Ning Liu, Guocheng Lv, Lefu Mei, Zhijian Peng, Ye Tian, Yangge Zhu, Haikun Liu
Summary: In this study, cobalt pentlandite (Co,Ni,Fe)9S8 (CNFS) electrocatalysts with good electrocatalytic activity and structural stability were successfully prepared. The optimized sample requires an overpotential of only 335 mV to drive a current density of 50 mA cm-2 under alkaline conditions. This work not only provides a promising catalyst candidate for efficient oxygen evolution reaction (OER) processes but also highlights the superiority of the cobalt pentlandite structure in the rational design of efficient OER electrocatalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jing Wang, Haihong Zhong, Luis Alberto Estudillo-Wong, Huiyu Li, Nicolas Alonso-Vante, Danqing Li, Pinggui Tang, Yongjun Feng
Summary: This study successfully synthesized nitrogen-doped graphene decorated with cobalt-based nanoparticles, showing excellent performance and stability, providing a new paradigm for the design of efficient non-precious metal-based electrocatalysts.
CATALYSIS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jing Yao, Mingyi Zhang, Xinzhi Ma, Lingling Xu, Feng Gao, Junpeng Xiao, Hong Gao
Summary: The study successfully improved the catalytic activity of oxygen evolution reaction by fabricating a CoP-CoO p-p type heterojunction array, providing insights for the design of efficient heterojunction catalysts.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Feifei Xu, Jianghong Zhao, Jianlong Wang, Taotao Guan, Kaixi Li
Summary: A high activity trifunctional non-noble electrocatalyst Co9S8@SNC was rationally designed and synthesized, showing excellent catalytic performance for ORR, HER, and OER reactions. With good conductivity and long-term stability, it can be a promising candidate for electrocatalytic materials in energy storage and conversion devices.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xiaoming Fan, Yuyin Fan, Xiao Zhang, Lin Tang, Jinxue Guo
Summary: The Co@CoO-PNC/CC heterostructured catalyst exhibits advanced oxygen evolution reaction (OER) performance in both alkaline and neutral solutions, attributed to abundant active sites, enhanced charge transfer between Co and CoO, and a specific P, N co-doped carbon nanofiber architecture.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Anil U. Kumar, Asis Sethi, Reen Maria Lawrence, Vishal M. Dhavale
Summary: A Co-Co3O4/NC catalyst with high stability and low overvoltage has been synthesized and shown to be efficient for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline conditions, potentially leading to energy savings compared to traditional Pt/C and IrO2 catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Muhammad Arif, Salma Bilal, Anwar Ul Haq Ali Shah
Summary: This paper presents a detailed study on the synthesis of low-cost and efficient nitrogen-doped reduced graphene oxide nickel-silver (N-rGO-Ni/Ag) and nickel-cobalt (N-rGO-Ni/Co) nanocomposites as electrocatalysts in fuel cells. The nanocomposites exhibit remarkable electrocatalytic activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), with low onset and half wave potentials and satisfactory Tafel values.
Article
Chemistry, Physical
Yongbin Hu, Xin Zhao, Fan Li, Qinglong Dong, Bo Wen, Dipeng Sun, Weicheng Liang, Xiao Lyu
Summary: This study aims to synthesize a spinel catalyst, ZnFe2O4 nanoparticles anchored on nitrogen-doped graphene (ZFO-NG), to improve the catalytic activity and stability of the oxygen evolution reaction (OER). The synthesized ZFO-NG catalyst exhibits excellent activity and stability in the OER, outperforming commercial IrO2 and other reported spinel OER catalysts.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Minjung Kim, Kyeongseok Min, Dasol Ko, Haemin Seong, Sang Eun Shim, Sung-Hyeon Baeck
Summary: Efficient bifunctional electrocatalysts play a vital role in hydrogen production and wastewater purification. In this study, a facile method was proposed to synthesize Co and N dual-doped Ni2P on Ni foam, which showed excellent catalytic performance for both OER and UOR. The Co-Ni2P-N/NF catalyst exhibited a low overpotential of 329 mV for OER and a significant reduction in potential for urea-assisted water oxidation, indicating its great potential in wastewater purification and energy-efficient hydrogen production.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
