Efficient hydrogen evolution catalysis using ternary pyrite-type cobalt phosphosulphide

Cabán-Acevedo, Miguel; Stone, Michael L.; Schmidt, J. R.; Thomas, Joseph G.; Ding, Qi; Chang, Hung Chih; Tsai, Meng Lin; He, Jr‐Hau; Jin, Song

doi:10.1038/nmat4410

Cited by 1,191 publications

(671 citation statements)

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“…A small Tafel slope is desirable to drive a large current at low overpotential, and metal sulfides usually exhibit Tafel slopes ranging from 40 to 120 mV/decade. 11,[43][44][45] The enhanced catalytic capability was confirmed by the EIS results, as the Nyquist plots ( Figure S11) for the Fe x Co 1−x S 2 (x = 0.98 to 0.32) exhibited substantially reduced charge-transfer resistance (R ct ) as compared to the Fe 1.00 Co 0.00 S 2 (Figure 5c). Among the Fe x Co 1−x S 2 , the lowest R ct of 23 was obtained at x = 0.68.…”

Section: Resultsmentioning

confidence: 73%

Cobalt-Doped Iron Sulfide as an Electrocatalyst for Hydrogen Evolution

Huang

Sodano

Leonard

et al. 2017

J. Electrochem. Soc.

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Iron disulfide (FeS 2 ) promises an earth-abundant, low-cost alternative to platinum group metals for the hydrogen evolution reaction (HER), but its performance is currently limited by reactivity of active sites and poor electrical conductivity. Here we employ Ketjenblack (KB) as a support to create an Fe-based electrocatalyst with high-electrical conductivity and maximal active sites. Moreover, a systematic study on the role of cobalt (Co) dopant was carried out. Electrochemical results show enhancements in HER activity of Co-doped FeS 2 [Fe x Co 1−x S 2 , atomic content of Fe (x) = 0.98 -0.32] in comparison to un-doped FeS 2 in acidic electrolyte (pH = 0). The overpotential necessary to drive a current density of 10 mA/cm 2 is −0.150 V and only decreases by 1 mV after 500 cycles of a durability test (cycling the potential between 0.0 and −0.15 V), indicating a long-term durability in acidic environment. This work suggests that Fe x Co 1−x S 2 offers a viable approach to improve the activity and durability of transition metal-sulfide electrocatalysts.

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Section: Resultsmentioning

confidence: 73%

Cobalt-Doped Iron Sulfide as an Electrocatalyst for Hydrogen Evolution

Huang

Sodano

Leonard

et al. 2017

J. Electrochem. Soc.

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“…As a result, more rapid liberation of catalytically‐active sites is achieved by faster release of bubble, thus benefiting for further contact of electrolytes on the catalyst/electrode surface. Later, the same research group reported a type of ternary pyrite‐type cobalt phosphosulphide (CoPS) nanowires as a highly efficient catalyst for both electrochemical and photoelectrochemical hydrogen evolution 52. By combining with a theoretical study, it was shown that the CoPS nanowire electrodes presented a geometrical current density of 10 mA cm –2 at a low overpotential of 48 mV vs. RHE.…”

Section: Hermentioning

confidence: 99%

One‐Dimensional Earth‐Abundant Nanomaterials for Water‐Splitting Electrocatalysts

2016

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Hydrogen fuel acquisition based on electrochemical or photoelectrochemical water splitting represents one of the most promising means for the fast increase of global energy need, capable of offering a clean and sustainable energy resource with zero carbon footprints in the environment. The key to the success of this goal is the realization of robust earth‐abundant materials and cost‐effective reaction processes that can catalyze both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with high efficiency and stability. In the past decade, one‐dimensional (1D) nanomaterials and nanostructures have been substantially investigated for their potential in serving as these electrocatalysts for reducing overpotentials and increasing catalytic activity, due to their high electrochemically active surface area, fast charge transport, efficient mass transport of reactant species, and effective release of gas produced. In this review, we summarize the recent progress in developing new 1D nanomaterials as catalysts for HER, OER, as well as bifunctional electrocatalysts for both half reactions. Different categories of earth‐abundant materials including metal‐based and metal‐free catalysts are introduced, with their representative results presented. The challenges and perspectives in this field are also discussed.

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“…Hydrogen has been referred as fuel of future with water as an oxidation product, no carbon and higher enthalpy of combustion than any other chemical fuel 1, 2, 3. Although extensive research has been carried out to produce the hydrogen fuel, still sustainable production of hydrogen is a great challenge 4.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysts for Hydrogen Evolution in Alkaline Electrolytes: Mechanisms, Challenges, and Prospective Solutions

et al. 2017

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Hydrogen evolution reaction (HER) in alkaline medium is currently a point of focus for sustainable development of hydrogen as an alternative clean fuel for various energy systems, but suffers from sluggish reaction kinetics due to additional water dissociation step. So, the state‐of‐the‐art catalysts performing well in acidic media lose considerable catalytic performance in alkaline media. This review summarizes the recent developments to overcome the kinetics issues of alkaline HER, synthesis of materials with modified morphologies, and electronic structures to tune the active sites and their applications as efficient catalysts for HER. It first explains the fundamentals and electrochemistry of HER and then outlines the requirements for an efficient and stable catalyst in alkaline medium. The challenges with alkaline HER and limitation with the electrocatalysts along with prospective solutions are then highlighted. It further describes the synthesis methods of advanced nanostructures based on carbon, noble, and inexpensive metals and their heterogeneous structures. These heterogeneous structures provide some ideal systems for analyzing the role of structure and synergy on alkaline HER catalysis. At the end, it provides the concluding remarks and future perspectives that can be helpful for tuning the catalysts active‐sites with improved electrochemical efficiencies in future.

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Efficient hydrogen evolution catalysis using ternary pyrite-type cobalt phosphosulphide

Cited by 1,191 publications

References 49 publications

Cobalt-Doped Iron Sulfide as an Electrocatalyst for Hydrogen Evolution

Cobalt-Doped Iron Sulfide as an Electrocatalyst for Hydrogen Evolution

One‐Dimensional Earth‐Abundant Nanomaterials for Water‐Splitting Electrocatalysts

Electrocatalysts for Hydrogen Evolution in Alkaline Electrolytes: Mechanisms, Challenges, and Prospective Solutions

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