Cu–Co–M arrays on Ni foam as monolithic structured catalysts for water splitting: effects of co-doped S-P

2019 ◽  
Vol 48 (4) ◽  
pp. 1322-1331 ◽  
Author(s):  
Xiaoqiang Du ◽  
Qizhao Shao ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Ni Foam ◽  
Structured Catalysts ◽  
A Current ◽  
Co Doped

Using Cu–Co–P-S as a bifunctional water-splitting catalyst, overpotential of ∼320 mV is obtained at a very low cell voltage of 1.55 V with a current density of 20 mA cm−2 in 1.0 M KOH.

An advanced and highly efficient Ce assisted NiFe-LDH electrocatalyst for overall water splitting

2020 ◽  
Vol 4 (1) ◽  
pp. 312-323 ◽  
Author(s):  
Harsharaj S. Jadhav ◽  
Animesh Roy ◽  
Bezawit Z. Desalegan ◽  
Jeong Gil Seo
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Room Temperature ◽  
Cell Voltage ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
A Cell ◽  
A Current

A room-temperature synthesized NiFeCe2 electrocatalyst delivered a current density of 10 mA cm−2 at a cell voltage of 1.59 V when used as the electrolyzer.

Construction of a MnCo2O4@NiyMx (S and P) crosslinked network for efficient electrocatalytic water splitting

CrystEngComm ◽  
2019 ◽  
Vol 21 (47) ◽  
pp. 7293-7302 ◽  
Author(s):  
Xiaoqiang Du ◽  
Jianpeng Fu ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
A Current

Using MnCo2O4@Ni3S2 as a bifunctional water splitting catalyst, an overpotential of ∼370 mV is obtained at a very low cell voltage of 1.60 V with a current density of 10 mA cm−2 in 1.0 M KOH.

Controllable synthesis of Cu–Ni–M (M = S, P and Se) hybrid nanoarrays for efficient water splitting reaction

2021 ◽  
Author(s):  
Nannan Chen ◽  
Yanhong Wang ◽  
Xiaoqiang Du ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Controllable Synthesis ◽  
A Cell ◽  
A Current

The results demonstrate that Cu–Ni–S/NF//Cu–Ni–P/NF pairs show superior water splitting performance with only requiring a cell voltage of 1.50 V to achieve a current density of 20 mA cm−2.

Design and synthesis of integrally structured Ni3N nanosheets/carbon microfibers/Ni3N nanosheets for efficient full water splitting catalysis

2017 ◽  
Vol 5 (19) ◽  
pp. 9377-9390 ◽  
Author(s):  
Tingting Liu ◽  
Mian Li ◽  
Chuanlai Jiao ◽  
Mehboob Hassan ◽  
Xiangjie Bo ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Electrolysis Cell ◽  
Design And Synthesis ◽  
A Cell ◽  
Carbon Microfibers ◽  
A Current

A (−) Ni3N/CMFs/Ni3N‖Ni3N/CMFs/Ni3N (+) electrolysis cell requires a cell voltage of only 1.65 V to achieve a current density of 20 mA cm−2.

Controllable synthesis of NiO/Ni3S2 hybrid arrays as efficient electrocatalysts for water splitting

2018 ◽  
Vol 42 (22) ◽  
pp. 18201-18207 ◽  
Author(s):  
Xiaoqiang Du ◽  
Qibin Wang ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Controllable Synthesis ◽  
A Cell ◽  
A Current

NiO/Ni3S2 affords a current density of 10 mA cm−2 in 1.0 M KOH at a cell voltage of 1.59 V, i.e., comparable to the commercial 20 wt% IrO2/C–40 wt% Pt/C couple (1.55 V at 10 mA cm−2).

Surface Phosphation of 3D NiCo2O4 Nanowires Grown on Ni Foam as an Efficient Bifunctional Catalyst for Water Splitting

NANO ◽  
2020 ◽  
Vol 15 (02) ◽  
pp. 2050024 ◽  
Author(s):  
Lanzi Cheng ◽  
Rui Zhang ◽  
Weixin Lv ◽  
Luyu Shao ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Water Splitting ◽  
Current Density ◽  
Electrode Materials ◽  
Catalyst Activity ◽  
Cell Voltage ◽  
Cost Effective ◽  
Bifunctional Catalyst ◽  
P Element ◽  
Ni Foam

Highly efficient, cost-effective and durable electrocatalysts for water splitting are crucial for energy conversion and storage. Transition-metal phosphides have been proven to be efficient catalysts for water splitting. In this paper, surface phosphation of 3D NiCo2O4 nanowires grown on Ni foam (P-NiCo2O4/NF) have been prepared to investigate the effect of surface phosphating on catalyst activity. XRD and XPS results demonstrate that P element has been decorated on the surface of the NiCo2O4 nanowires. The electrochemical results prove that P-NiCo2O4/NF shows better electrochemical performance than pure NiCo2O4/NF as an electrode for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) of water splitting. It achieves a current density of 10[Formula: see text]mA cm2 at an overpotential of 279[Formula: see text]mV and 164[Formula: see text]mV for OER and HER in 1.0[Formula: see text]M KOH electrolyte, respectively. In addition, the P-NiCo2O4/NF[Formula: see text]P-NiCo2O4/NF electrode is constructed by employing P-NiCo2O4/NF as both the anode and cathode, it only requires a low 1.68[Formula: see text]V of cell voltage to reach the current density of 10[Formula: see text]mA cm[Formula: see text]. Notably, P-NiCo2O4/NF[Formula: see text]P-NiCo2O4/NF also exhibits excellent stability for over 30[Formula: see text]h-long. These results indicate that surface phosphation is an effective approach to improve the electrochemical performance of NiCo2O4/NF electrode materials.

Photothermal coupling electrolysis on Ni–W–B toward practical overall water splitting

2019 ◽  
Vol 7 (20) ◽  
pp. 12440-12445 ◽  
Author(s):  
Weiju Hao ◽  
Renbing Wu ◽  
Hongyuan Yang ◽  
Yanhui Guo
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Photothermal Effect ◽  
Carbon Cloth ◽  
Cell Temperature ◽  
Overall Water Splitting ◽  
A Current

An overall water splitting device assembled using a photothermal effect coupled Ni–W–B/carbon cloth electrode could deliver a current density of 25 mA cm−2 at an ultralow cell voltage of 1.524 V without heating the whole system, which is comparable to its performance at an elevated cell temperature of 50 °C.

Oxide/sulfide-based hybrid arrays as robust electrocatalysts for water splitting

2018 ◽  
Vol 47 (30) ◽  
pp. 10273-10280 ◽  
Author(s):  
Xiaoqiang Du ◽  
Qibin Wang ◽  
Yu Li ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
A Cell ◽  
A Current

NiCo2O4/Ni3S2 affords a current density of 10 mA cm−2 in 1.0 M KOH at a cell voltage of 1.58 V, i.e., comparable to that of the commercial 20 wt% IrO2/C–40 wt% Pt/C couple (1.52 V at 10 mA cm−2).

Controlled synthesis of Ni(OH)2/Ni3S2hybrid nanosheet arrays as highly active and stable electrocatalysts for water splitting

2018 ◽  
Vol 6 (16) ◽  
pp. 6938-6946 ◽  
Author(s):  
Xiaoqiang Du ◽  
Zhi Yang ◽  
Yu Li ◽  
Yaqiong Gong ◽  
Min Zhao
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Controlled Synthesis ◽  
Highly Active ◽  
Nanosheet Arrays ◽  
A Current

Using Ni(OH)2/Ni3S2-12h as a bifunctional water splitting catalyst, with an overpotential of ∼340 mV, which is obtained at a very low cell voltage of 1.57 V with a current density of 10 mA cm−2in 1.0 M KOH.

3D hierarchical Co3O4@Co3S4 nanoarrays as anode and cathode materials for oxygen evolution reaction and hydrogen evolution reaction

2018 ◽  
Vol 47 (45) ◽  
pp. 16305-16312 ◽  
Author(s):  
Xiaoqiang Du ◽  
Hui Su ◽  
Xiaoshuang Zhang
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Cathode Materials ◽  
Oxygen Evolution Reaction ◽  
Cell Voltage ◽  
A Current

Using Co3O4@Co3S4-24 h as a bifunctional water splitting catalyst, an overpotential of ∼300 mV is obtained at a very low cell voltage of 1.53 V with a current density of 10 mA cm−2 in 1.0 M KOH.

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