MXene supported CoxAy (A = OH, P, Se) electrocatalysts for overall water splitting: unveiling the role of anions in intrinsic activity and stability

2019 ◽  
Vol 7 (48) ◽  
pp. 27383-27393 ◽  
Author(s):  
N. Clament Sagaya Selvam ◽  
Jooyoung Lee ◽  
Gwan H. Choi ◽  
Min Jun Oh ◽  
Shiyu Xu ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxidation Process ◽  
Intrinsic Activity ◽  
Overall Water Splitting ◽  
Hybrid Catalysts

MXene-supported CoP and Co7Se8 catalysts showed enhanced water-splitting activity. The oxidation process of the anion components (P and Se) of the hybrid catalysts, under OER conditions, significantly influenced the activity and stability.

scholarly journals A structurally versatile nickel phosphite acting as a robust bifunctional electrocatalyst for overall water splitting

2018 ◽  
Vol 11 (5) ◽  
pp. 1287-1298 ◽  
Author(s):  
Prashanth W. Menezes ◽  
Chakadola Panda ◽  
Stefan Loos ◽  
Florian Bunschei-Bruns ◽  
Carsten Walter ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Bifunctional Electrocatalyst ◽  
Overall Water Splitting

The mechanistically distinct and synergistic role of phosphite anions in hydrogen evolution and nickel cations in oxygen evolution have been uncovered for active and durable overall water splitting catalysis in nickel phosphite.

2D van der Waals heterostructures of graphitic BCN as direct Z-scheme photocatalysts for overall water splitting: the role of polar π-conjugated moieties

2020 ◽  
Vol 22 (41) ◽  
pp. 23735-23742
Author(s):  
Zhijie Wang ◽  
Zhibo Luo ◽  
Jia Li ◽  
Kang Yang ◽  
Gang Zhou
Keyword(s):  
Water Splitting ◽  
Van Der Waals ◽  
Van Der Waals Heterostructures ◽  
Overall Water Splitting ◽  
Π Stacking

A principle diagram of BC3/C3N and BC3/BC6N heterostructures immobilized by π–π stacking as direct Z-scheme photocatalysts for water splitting.

Electrodepositing Pd on NiFe layered double hydroxide for improved water electrolysis

2019 ◽  
Vol 3 (5) ◽  
pp. 842-850 ◽  
Author(s):  
Jinxue Guo ◽  
Jikang Sun ◽  
Yanfang Sun ◽  
Qingyun Liu ◽  
Xiao Zhang
Keyword(s):  
Charge Transfer ◽  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Active Sites ◽  
Nickel Foam ◽  
Water Electrolysis ◽  
Pd Nanoparticles ◽  
Intrinsic Activity ◽  
Overall Water Splitting ◽  
Double Hydroxide

Ultrafine Pd nanoparticles with less than 0.12 at% are electrodeposited on nickel foam supported NiFe LDH to obtain improved intrinsic activity, more active sites, and enhanced charge transfer for improved bifunctionality towards overall water splitting.

scholarly journals Efficient overall water splitting in acid with anisotropic metal nanosheets

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dongshuang Wu ◽  
Kohei Kusada ◽  
Satoru Yoshioka ◽  
Tomokazu Yamamoto ◽  
Takaaki Toriyama ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Intrinsic Activity ◽  
Efficient Catalyst ◽  
Overall Water Splitting ◽  
Resolution Electron ◽  
Low Performance ◽  
Performance Results ◽  
Splitting Water ◽  
Anisotropic Metal

AbstractWater is the only available fossil-free source of hydrogen. Splitting water electrochemically is among the most used techniques, however, it accounts for only 4% of global hydrogen production. One of the reasons is the high cost and low performance of catalysts promoting the oxygen evolution reaction (OER). Here, we report a highly efficient catalyst in acid, that is, solid-solution Ru‒Ir nanosized-coral (RuIr-NC) consisting of 3 nm-thick sheets with only 6 at.% Ir. Among OER catalysts, RuIr-NC shows the highest intrinsic activity and stability. A home-made overall water splitting cell using RuIr-NC as both electrodes can reach 10 mA cm−2geo at 1.485 V for 120 h without noticeable degradation, which outperforms known cells. Operando spectroscopy and atomic-resolution electron microscopy indicate that the high-performance results from the ability of the preferentially exposed {0001} facets to resist the formation of dissolvable metal oxides and to transform ephemeral Ru into a long-lived catalyst.

Nitrogen‐Incorporated Cobalt Sulfide/Graphene Hybrid Catalysts for Overall Water Splitting

ChemSusChem ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 5112-5118 ◽  
Author(s):  
Yun Tong ◽  
Qiong Sun ◽  
Pengzuo Chen ◽  
Lu Chen ◽  
Zhaofu Fei ◽  
...  
Keyword(s):  
Water Splitting ◽  
Cobalt Sulfide ◽  
Overall Water Splitting ◽  
Hybrid Catalysts

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.

Li-III-VI bilayers for efficient photocatalytic overall water splitting: the role of intrinsic electric field

2019 ◽  
Vol 7 (45) ◽  
pp. 26123-26130 ◽  
Author(s):  
Yingcai Fan ◽  
Xiaohan Song ◽  
Siyun Qi ◽  
Xikui Ma ◽  
Mingwen Zhao
Keyword(s):  
Electric Field ◽  
Water Splitting ◽  
Highly Efficient ◽  
Overall Water Splitting

Intrinsic polarized Li-III-VI bilayers as highly efficient photocatalysts for overall water splitting.

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