Cobalt-molybdenum nanosheet arrays as highly efficient and stable earth-abundant electrocatalysts for overall water splitting

Nano Energy ◽  
2018 ◽  
Vol 45 ◽  
pp. 448-455 ◽  
Author(s):  
Ying Zhang ◽  
Qi Shao ◽  
Shui Long ◽  
Xiaoqing Huang
Keyword(s):  
Water Splitting ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Nanosheet Arrays ◽  
Earth Abundant

P-Doped Iron–Nickel Sulfide Nanosheet Arrays for Highly Efficient Overall Water Splitting

2019 ◽  
Vol 11 (31) ◽  
pp. 27667-27676 ◽  
Author(s):  
Caichi Liu ◽  
Dongbo Jia ◽  
Qiuyan Hao ◽  
Xuerong Zheng ◽  
Ying Li ◽  
...  
Keyword(s):  
Water Splitting ◽  
Nickel Sulfide ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Nanosheet Arrays ◽  
Iron Nickel

Sulfur defects rich Mo-Ni3S2 QDs assisted by O-C=O chemical bonding for efficient electrocatalytic overall water splitting

Nanoscale ◽  
2021 ◽  
Author(s):  
Honglei Chen ◽  
Zebin Yu ◽  
Ronghua Jiang ◽  
Jun Huang ◽  
Yanping Hou ◽  
...  
Keyword(s):  
Water Splitting ◽  
Chemical Bonding ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Earth Abundant ◽  
Further Development

Developing earth-abundant and highly efficient electrocatalysts is critical for further development of system. The metal (M) doping strategy and inorganic / organic composite are two common strategies to improve the...

scholarly journals Two-Dimensional Layered NiLiP2S6 Crystals as an Efficient Bifunctional Electrocatalyst for Overall Water Splitting

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 786
Author(s):  
Song-Jeng Huang ◽  
Adil Muneeb ◽  
Palani Sabhapathy ◽  
Khasim Saheb Bayikadi ◽  
Tahir Murtaza ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Alkaline Media ◽  
Intrinsic Activity ◽  
Tafel Slope ◽  
Bifunctional Electrocatalyst ◽  
Long Term Stability ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Earth Abundant

The quest of earth-abundant bifunctional electrocatalysts for highly efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is essential for clean and renewable energy systems. Herein, directed by the experimental analysis, we demonstrate layered nickel lithium phosphosulfide (NiLiP2S6) crystal as a highly efficient water-splitting catalyst in alkaline media. With strained lattice due to stacked layers as observed by TEM and electronic structure analysis performed by XPS showed mixed Ni2+,3+ oxidation states induced by addition of Li as a cation, NiLiP2S6 displays excellent OER (current density of 10 mA cm–2 showed an overpotential of 303 mV vs. RHE and a Tafel slope of 114 mV dec–1) and HER activity (current density of −10 mA cm–2 showed an overpotential of 184 mV vs. RHE and a Tafel slope of 94.5 mV dec–1). Finally, an alkaline media was employed to demonstrate the overall water splitting using NiLiP2S6 as both the anode and the cathode, which attained a 50 mA cm−2 current density at 1.68 V. This bimetallic phosphosulfide, together with long-term stability and enhanced intrinsic activity, shows enormous potential in water splitting applications.

scholarly journals Graphene/MoS2/FeCoNi(OH)x and Graphene/MoS2/FeCoNiPx multilayer-stacked vertical nanosheets on carbon fibers for highly efficient overall water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xixi Ji ◽  
Yanhong Lin ◽  
Jie Zeng ◽  
Zhonghua Ren ◽  
Zijia Lin ◽  
...  
Keyword(s):  
Water Splitting ◽  
Carbon Fibers ◽  
Graphene Nanosheets ◽  
Water Electrolysis ◽  
Hybrid Structure ◽  
Hydrogen Energy ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
Stable Oxygen ◽  
Excellent Stability

AbstractDevelopment of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH)x) are successively grown on carbon fibers (CF/VGSs/MoS2/FeCoNi(OH)x). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241 mV to attain 500 and 1000 mA cm−2 and small Tafel slope of 29.2 mV dec−1. Theoretical calculation indicates that compositing of FeCoNi(OH)x with MoS2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS2/FeCoNi(OH)x anode for overall water splitting, which generates a current density of 100 mA cm−2 at 1.59 V with excellent stability over 100 h. Our highly efficient catalysts have great prospect for water electrolysis.

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