Earth-abundant inorganic electrocatalysts and their nanostructures for energy conversion applications

Faber, Matthew S.; Jin, Song

doi:10.1039/c4ee01760a

Cited by 1,208 publications

(723 citation statements)

References 231 publications

(376 reference statements)

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“…4c and Table S1 for more details). Generally, a Tafel slope of 116, 38, and 29 mV dec −1 was expected if the rate-determining step in HER was Volmer, Heyrovsky, and Tafel reactions, respectively [48]. Thus the experimentally observed Tafel slope of 68 mV dec −1 for NF-120 implies that hydrogen evolution behavior occurring on the surface follows a Volmer−Heyrovsky mechanism.…”

Section: Resultsmentioning

confidence: 90%

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Hou

et al. 2017

Sci. China Mater.

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Exploring and designing bi-functional catalysts with earth-abundant elements that can work well for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline medium are of significance for producing clean fuel to relieve energy and environment crisis. Here, a novel Ni/NiO monolithic electrode was developed by a facile and cost-effective acid promoted activation of Ni foam. After the treatment, this obtained monolithic electrode with a layer of NiO on its surface demonstrates rough and sheet-like morphology, which not only possesses larger accessible surface area but also provides more reactive active sites. Compared with powder catalysts, this monolithic electrode can achieve intimate contact between the electrocatalyst and the current collector, which will alleviate the problem of pulverization and enable the stable function of the electrode. It can be served as an efficient bi-functional electrocatalyst with an overpotential of 160 mV for HER and 290 mV for OER to produce current densities of 10 mA cm −2 in the alkaline medium. And it maintains benign stability after 5,000 cycles, which rivals many recent reported noble-metal free catalysts in 1.0 mol L −1 KOH solution. Attributed to the easy, scalable methodology and high catalytic efficiency, this work not only offers a promising monolithic catalyst but also inspires us to exploit other inexpensive, highly efficient and self-standing noble metalfree electrocatalysts for scale-up electrochemical water-splitting technology.

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Section: Resultsmentioning

confidence: 90%

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Hou

et al. 2017

Sci. China Mater.

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“…The metals on the left side of the volcano have a larger negative ΔG H* , which means that H adsorption is stronger than on PGM atoms resulting in a more difficult hydrogen evolution. In contrast, the materials on the right side of the volcano bind hydrogen more weakly, thus preventing the formation of stable intermediates on the electrode surface and consequently suppressing the HER [15,19,[26][27][28].…”

Section: Predictive Modelingmentioning

confidence: 99%

“…In particular, the cubic pyrite-phase TMDCs with the general formula MX 2 (M = Fe, Co, Ni; X = S, Se, Te) have been found to be efficient electrocatalysts, CoS 2 and NiS 2 phases in particular [27,64]. Although the HER performance of the TM pyrite phases is reasonably higher than that of MoS 2 , these highly active electrocatalysts suffer from stability and durability drawbacks.…”

Section: Pt Alloysmentioning

confidence: 99%

“…Of special interest is the Co-P system due to its increased stability and durability in WE. For instance, cobalt phosphides with different morphologies such as nanoparticles, nanoporous nanowire arrays, nanosheets, and nanoparticles supported on carbon nanotubes (CNTs) exhibited excellent activity in HER, and more importantly, long-term stability in acidic conditions with better performance than Ni 2 P [27]. In particular, the CoP supported on carbon cloth has low η onset = 38 mV and η 10 = 67 mV, as well as a small T S = 51 mV dec −1 , while preserving its activity for at least 22 h in acidic electrolyte [75].…”

Section: Phosphidesmentioning

confidence: 99%

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Emerging nanostructured electrode materials for water electrolysis and rechargeable beyond Li-ion batteries

Pomerantseva

Resini

Kovnir

et al. 2017

Advances in Physics: X

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This review describes recent advances in electrochemical water electrolysis and rechargeable beyond Li-ion battery research, two emergent and widely employed technologies playing important roles in clean energy production and storage. The principle components of these electrochemical processes are electrode materials, which are currently facing challenges in performance improvement, thus motivating the development of novel electrode materials. This development requires synergistic interactions between experimentalists and theorists with backgrounds in solid state chemistry, condensed matter physics, and materials science and engineering. In light of a large amount of literature covering the topic, we will focus this review on the seminal electrode materials that have been discovered in the last five years, such as transition metal chalcogenides, carbides, and phosphides, as well as 2D layered materials. Intensive cross-disciplinary research is also dedicated to nanostructuring and hybridization of the emerging electrode materials in order to maximize the efficiency and simultaneously to lower the cost of the processes. As the understanding of the nanoscale-related effects deepens, it opens important pathways to the discovery of further materials and their improvement.

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“…[18] Therefore, extensive studies have focused on the development of alternative electrocatalysts with high activity, long stability, low cost, widespread availability, and facile synthesis. [8][9][10]19,20] To replace precious-metal-based catalysts, a wide range of non-noble-metal materials, especially transition-metal-based materials and metal-free carbon materials, have been intensively investigated as electrocatalysts for different applications. [21] Most of these electrocatalyst candidates show great promise in energy-conversion reactions.…”

mentioning

confidence: 99%

Design Strategies toward Advanced MOF‐Derived Electrocatalysts for Energy‐Conversion Reactions

Liu

Zhu

Guo

et al. 2017

Advanced Energy Materials

609

351

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great potential to meet our ever-growing demand for energy. These devices appear most promising due to their high energyconversion and storage efficiencies, portability, which can mitigate the intermittent distribution of the aforementioned energy in space and time, and environmental benignancy. [6][7][8][9][10] Fundamentally, these electrochemical systems or devices involve different energy-conversion reactions, such as the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and electrochemical CO 2 reduction (ECR), which provide energy by directly converting chemical energy (e.g., methanol, ethanol, zinc, and hydrogen) into electrical energy, or store energy vice versa. [6][7][8][9][10][11][12] The intrinsically sluggish kinetics of these reactions highlights the critical role of electrocatalysts. In this regard, the development of advanced electrocatalysts has always been the technological bottleneck that hinders the practical applications of these energy techniques at any appreciable scale. [7][8][9][10][11][12] Currently, noble-metal-based materials (e.g., Pt, IrO 2 , RuO 2 , and Au) are considered to be state-of-the-art catalysts for a variety of energy devices, [13][14][15][16] such as proton exchange membrane fuel cells (PEMFCs). [13] In spite of their outstanding catalytic performance for many electrochemical reactions, the high cost and scarcity of these noble metals severely hamper their large-scale commercialization. [17] Further, precious metal catalysts face issues with poisoning when exposed to a range of chemical compounds like methaol and carbon monoxide, leading to significant activity loss. [18] Therefore, extensive studies have focused on the development of alternative electrocatalysts with high activity, long stability, low cost, widespread availability, and facile synthesis. [8][9][10]19,20] To replace precious-metal-based catalysts, a wide range of non-noble-metal materials, especially transition-metal-based materials and metal-free carbon materials, have been intensively investigated as electrocatalysts for different applications. [21] Most of these electrocatalyst candidates show great promise in energy-conversion reactions. Nevertheless, very few alternative materials have yet to achieve superior electrochemical properties to those of noble-metal-based catalysts. Fortunately, the accumulation of experimental and theoretical studies have significantly advanced our knowledge on the chemical and physical nature of various candidate materials. [10][11][12] For example, our group has shed light on the activity origin of The key challenge to developing renewable and clean energy technologies lies in the rational design and synthesis of efficient and earth-abundant catalysts for a wide variety of electrochemical reactions. This review presents materials design strategies for constructing improved electrocatalysts based on MOF precursors/templates, with special emphasis on component manipulation, morphology control, and structure engineering. G...

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Earth-abundant inorganic electrocatalysts and their nanostructures for energy conversion applications

Abstract: Various classes of earth-abundant inorganic electrocatalysts for energy conversion are surveyed and their recent and ongoing development is discussed.

Cited by 1,208 publications

References 231 publications

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

Emerging nanostructured electrode materials for water electrolysis and rechargeable beyond Li-ion batteries

Design Strategies toward Advanced MOF‐Derived Electrocatalysts for Energy‐Conversion Reactions

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