Semiconductor-based Photocatalytic Hydrogen Generation

Chen, Xiaobo; Shen, Shaohua; Guo, Liejin; Mao, Samuel S.

doi:10.1021/cr1001645

Cited by 7,206 publications

(4,592 citation statements)

References 1,104 publications

Supporting

Mentioning

4,534

Contrasting

Unclassified

Order By: Relevance

“…A large number of them consist of transition metal cations (e.g., Ti 4+ , Zr 4+ , Nb 5+ , Ta 5+ , W 6+ , and Mo 6+ ) with the d 0 configuration. Their conduction bands are composed of vacant metal d orbitals and usually more negative than 0 V, while their valence bands are composed of O 2p orbitals and usually more positive than 3 eV 116. The band structure of these metal oxides can generally enable the simultaneous CO 2 reduction and water oxidation, but their wide band gap more than often restricts the utilization of solar spectrum only within the UV region 117, 118.…”

Section: Photocatalytic Materials For Co2 Reductionmentioning

confidence: 99%

“…Furthermore, many main group metal oxides with metal cations (e.g., In 3+ , Ga 3+ , Ge 4+ , Sn 4+ , and Sb 5+ ) in the d 10 configuration are also photocatalytically active. Their conduction bands consist of hybridized sp orbitals with large dispersion and are able to provide photogenerated electrons with high reducing power 116, 118. Unfortunately, their higher conduction bands translate to further broadened band gaps.…”

Section: Photocatalytic Materials For Co2 Reductionmentioning

confidence: 99%

See 1 more Smart Citation

CO₂ Reduction: From the Electrochemical to Photochemical Approach

et al. 2017

View full text Add to dashboard Cite

Increasing CO2 concentration in the atmosphere is believed to have a profound impact on the global climate. To reverse the impact would necessitate not only curbing the reliance on fossil fuels but also developing effective strategies capture and utilize CO2 from the atmosphere. Among several available strategies, CO2 reduction via the electrochemical or photochemical approach is particularly attractive since the required energy input can be potentially supplied from renewable sources such as solar energy. In this Review, an overview on these two different but inherently connected approaches is provided and recent progress on the development, engineering, and understanding of CO2 reduction electrocatalysts and photocatalysts is summarized. First, the basic principles that govern electrocatalytic or photocatalytic CO2 reduction and their important performance metrics are discussed. Then, a detailed discussion on different CO2 reduction electrocatalysts and photocatalysts as well as their generally designing strategies is provided. At the end of this Review, perspectives on the opportunities and possible directions for future development of this field are presented.

show abstract

Section: Photocatalytic Materials For Co2 Reductionmentioning

confidence: 99%

Section: Photocatalytic Materials For Co2 Reductionmentioning

confidence: 99%

CO₂ Reduction: From the Electrochemical to Photochemical Approach

et al. 2017

View full text Add to dashboard Cite

show abstract

“…With the fast consumption of fossil fuels and gradual deterioration of global climate and environment situations due to carbon release, the research and development of clean and sustainable energy resources such as solar and wind energies have the promise of satisfying the energy need with minimum carbon footprint in the environment 1, 2, 3, 4, 5. Hydrogen has been well recognized as one of the most abundant and promising candidates for clean energy supply to replace fossil fuels since the beginning of 1970's, as the only combustion product is water 6, 7, 8, 9, 10, 11, 12, 13.…”

Section: Introductionmentioning

confidence: 99%

“…Firstly observed in 1789, the electrochemical water splitting is typically processed in an electrolyzer, which contains a cathode and an anode for the water reduction and oxidation half reactions, respectively 1, 5. An electrolyte is also used for transporting charges or ions between the cathode and anode.…”

Section: Introductionmentioning

confidence: 99%

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

2016

View full text Add to dashboard Cite

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.

show abstract

“…To address this challenge, many promising strategies such as photocatalytic or photoelectrochemical or electrocatalytic water splitting have been extensively explored 2, 3, 4, 5, 6. Water electrolysis such as water‐alkali electrolyzers or chlor‐alkali electrolyzers currently adopted in industrial processes is more suitable for centralized hydrogen production because the input energy is electricity which can be easily concentrated and be converted from abundant but dispersive energy sources such as wind energy, tide energy, and solar energy 7, 8, 9.…”

Section: Introductionmentioning

confidence: 99%

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS₂ Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction

2017

View full text Add to dashboard Cite

Molybdenum disulfide (MoS2)‐based materials have been recently identified as promising electrocatalysts for hydrogen evolution reaction (HER). However, little work has been done to improve the catalytic performance of MoS2 toward HER in alkaline electrolytes, which is more suitable for water splitting in large‐scale applications. Here, it is reported that the hybridization of 0D nickel hydr(oxy)oxide nanoparticles with 2D metallic MoS2 nanosheets can significantly enhance the HER activities in alkaline and neutral electrolytes. Impressively, the optimized hybrid catalyst can drive a cathodic current density of 10 mA cm−2 at an overpotential of ≈73 mV for HER in 1 m KOH, about 185 mV smaller than the original MoS2. The improved HER activity is attributed to a bifunctional mechanism adopted in these hybrid catalysts, in which nickel hydr(oxy)oxide promotes the water adsorption and dissociation to supply protons for subsequent reactions occurred on MoS2 to generate H2.

show abstract

Semiconductor-based Photocatalytic Hydrogen Generation

Cited by 7,206 publications

References 1,104 publications

CO₂ Reduction: From the Electrochemical to Photochemical Approach

CO₂ Reduction: From the Electrochemical to Photochemical Approach

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

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS₂ Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction

Contact Info

Product

Resources

About

Semiconductor-based Photocatalytic Hydrogen Generation

Cited by 7,206 publications

References 1,104 publications

CO2 Reduction: From the Electrochemical to Photochemical Approach

CO2 Reduction: From the Electrochemical to Photochemical Approach

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

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS2 Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction

Contact Info

Product

Resources

About

CO₂ Reduction: From the Electrochemical to Photochemical Approach

CO₂ Reduction: From the Electrochemical to Photochemical Approach

Nickel Hydr(oxy)oxide Nanoparticles on Metallic MoS₂ Nanosheets: A Synergistic Electrocatalyst for Hydrogen Evolution Reaction