Ionic liquid-assisted synthesis of Cu7Te4 ultrathin nanosheets with enhanced electrocatalytic activity for water oxidation

Qin, Qing; Chai, Zhenzhen; Zhang, Jing; Cui, Yingxue; Li, Tianyu; Zheng, Weitao

doi:10.1016/j.nanoen.2017.03.009

Cited by 48 publications

(57 citation statements)

References 54 publications

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“…The lower specific surface area of Pt/C will reduce its current density to some extent. Our catalysts show the larger specific surface areas that endow them with large contact areas for the electrode/electrolyte as well as a larger number of exposed surface atoms that can serve as electrochemically active sites for ORR, OER, and HER . Combined with the above these analyses, the structures of the catalysts are determined to be Rh x P/NPC and RuP/NPC.…”

Section: Resultsmentioning

confidence: 91%

Low Loading of Rh_xP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions

Qin

Jang

Chen

et al. 2018

Advanced Energy Materials

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192

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abovementioned energy devices; however, these three reactions suffer from sluggish kinetics and generally require a large overpotential to occur. [2] Currently, Pt-, Ir-, and Ru-based materials are the state-of-the-art electrocatalysts for these reactions, and they can greatly reduce the energy barrier of electrochemical processes and accelerate the electrochemical reaction rate. [3] However, the scarcity and high cost of these noble metals strongly obstruct their large-scale application in energy devices. [4] In addition, these noble metal catalysts always suffer from the insufficient durability in the corrosive electrolytes. [5] Therefore, reducing the cost of the catalysts and enhancing the durability of the mentioned noble metal catalysts are urgently needed. At present, replacing noble metal materials with metal-free or nonprecious metal catalysts is a popular research topic but remains an enormous challenge because of the poor performance with the alternative catalysts in real energy devices. On the other hand, decreasing the content of noble metals and replacing them with other relatively low-cost noble metals is considered as a more practical strategy for accelerating their industrial application. For the HER, transition-metal phosphides (TMPs) have emerged as the promising materials due to their high activities, abundant reserves, and low cost, [6] and therefore are considered as potential alternatives to Pt; [7] however, the activities of these TMP-based catalysts are still worse than those of Pt-based catalysts. Some of TMP-based catalysts, such as CoP nanocrystals, [2] M 2 P (M = Ni, Co, Mn), [8] and FeP, [9] have shown a stable and decent ORR performance, but their activities are rarely comparable to that of the benchmark catalyst Pt/C. For the OER, the active sites in TMPs are the surface oxy/hydroxides (M-OOH, M = Fe, Co, Ni) and phosphates that are formed in situ during the OER process, instead of the metal phosphides. [10] As members of the Pt group, Rh-and Ru-based catalysts usually exhibit higher electrochemical activities [11,12] than TMPs, and noble metal-based M x P catalysts (M = Rh, Ru) have demonstrated excellent HER activities close to, even better than that of Pt/C, such as RuP 2 /N, P codoped carbon (NPC), [13] but the content of Ru in the catalyst is ≈23.3 wt%, thus, there is still room to low the loading of Ru for reducing the cost of these catalysts. Because the noble metal Rh is more expensive than that of Ru, even the loading of Rh is about 14.7 wt% in a Reducing the consumption of noble metals in energy devices, such as fuel cells, zinc-air batteries, and water splitting cells, is a core issue for achieving an environmentally sustainable society. Herein, two highly efficient electrocatalysts are synthesized, composed of N, P codoped carbon (NPC) modified with noble metals phosphides (Rh x P/NPC and RuP/NPC) through pyrolysis of a mixture of RhCl 3 · xH 2 O or RuCl 3 · xH 2 O, respectively, with phytic acid. Unlike the reported rhodium and ruthenium phosphides, Rh x P/ NPC and...

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Section: Resultsmentioning

confidence: 91%

Low Loading of Rh_xP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions

Qin

Jang

Chen

et al. 2018

Advanced Energy Materials

Self Cite

192

105

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“…Metal telluride nanoparticles also generated much attention as a potential electrocatalyst for water splitting. Recently, various photocathodes such as CoTe films, ZnTe, ultrathin nanosheets of Cu 7 Te 4 , Cu x Te, ZnTe modified with carbon and molybdenum sulphide etc. have been studied with modifications, resulted highly improved photoelectrochemical performance.…”

Section: Applications Of Metal Telluride Nanomaterialsmentioning

confidence: 99%

Metal Telluride Nanomaterials: Facile Synthesis, Properties and Applications for Third Generation Devices.

Jamwal

Mehta

2019

ChemistrySelect

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From the material science community, metal telluride semiconductor nanostructures have lately attracted a significant quantity of attention. On account of physics associated in quantum confinement, remarkable surface chemistry metal telluride became the most explored group of semiconductor nanomaterials. The intensive concern in this area originates from their exceptional optical, chemical and electronic properties which give rise to their potential use in the field of solar energy conversion, nonlinear optics, catalysis, thermoelectric and magnetic, as well as other areas. In the current review, shape and size‐controlled synthesis strategies, substantial properties and some selected applications for metal telluride nanostructures are highlighted, for the synthesis of nanoparticles each method is favourably analyzed.

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“…reported that Cu 7 Te 4 ultrathin nanosheets needed the overpotential of 460 mV to achieve a current density of 10 mA cm −2 in the OER. [ 12 ] Fe incorporation into NiTe due to induced partial charge transfer was developed as high‐efficiency OER catalysts with the overpotential of 280 mV to drive 10 mA cm −2 . [ 13 ] Designed CoTe 2 /CNT catalyst with synergistic effect between CoTe 2 and CNT exhibited excellent OER performance, requiring merely 291 mV to achieve the current density of 10 mA cm −2 .…”

Section: Introductionmentioning

confidence: 99%

Metallic S‐CoTe with Surface Reconstruction Activated by Electrochemical Oxidation for Oxygen Evolution Catalysis

Yang

Qin

Dong

et al. 2021

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Developing highly active electrocatalysts toward oxygen evolution reaction (OER) is critical for the application of water splitting for hydrogen production and can further alleviate the energy crisis problem, but still remaining challenging. Especially, unlocking the catalytic site, in turn, helps design the available catalysts. Herein, the nanorod cobalt telluride with sulfur incorporation grown on a carbon cloth (S‐CoTe/CC) as catalysts for OER, which displays extraordinary catalytic activity, is reported. Significantly, the in situ formed CoOOH species on the surface of S‐CoTe merited from the structure evolution during the OER process serves as the active species. Furthermore, density functional theory calculations demonstrate that sulfur incorporation can tailor the electronic structure of active species and substantially optimize the free energy, accelerating the OER kinetics. This work provides an in‐depth understanding of enhanced OER mechanism through foreign elements incorporating into precatalysts and is beneficial for the guiding design of more efficient catalysts.

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Ionic liquid-assisted synthesis of Cu7Te4 ultrathin nanosheets with enhanced electrocatalytic activity for water oxidation

Cited by 48 publications

References 54 publications

Low Loading of Rh_xP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions

Low Loading of Rh_xP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions

Metal Telluride Nanomaterials: Facile Synthesis, Properties and Applications for Third Generation Devices.

Metallic S‐CoTe with Surface Reconstruction Activated by Electrochemical Oxidation for Oxygen Evolution Catalysis

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Ionic liquid-assisted synthesis of Cu7Te4 ultrathin nanosheets with enhanced electrocatalytic activity for water oxidation

Cited by 48 publications

References 54 publications

Low Loading of RhxP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions

Low Loading of RhxP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions

Metal Telluride Nanomaterials: Facile Synthesis, Properties and Applications for Third Generation Devices.

Metallic S‐CoTe with Surface Reconstruction Activated by Electrochemical Oxidation for Oxygen Evolution Catalysis

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Product

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Low Loading of Rh_xP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions

Low Loading of Rh_xP and RuP on N, P Codoped Carbon as Two Trifunctional Electrocatalysts for the Oxygen and Hydrogen Electrode Reactions