Photocatalytic water splitting for solving energy crisis: Myth, Fact or Busted?

Ng, Kim Hoong; Lai, Sin Yuan; Cheng, Chin Kui; Cheng, Yoke Wang; Chong, Chi Cheng

doi:10.1016/j.cej.2021.128847

Cited by 117 publications

(40 citation statements)

References 143 publications

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“…Photocatalytic water splitting has drawn much interest since it offers sustainable hydrogen energy under carbon-free conditions. [24][25][26][27] Among various photocatalysts, MOFs have a series of advantages including the structural variety and tunability, the high surface area and porosity, particularly the interaction and the distance between the metallic nodes and the organic linkers in many cases are convenient for an efficient energy transfer from the excited organic linkers to the metal nodes. [28][29][30][31][32][33][34] However, the vast majority of researches on MOF photocatalysts for water splitting have focused on the half reaction, namely, the evolution of H 2 or O 2 , and under most conditions a co-catalyst is required.…”

Section: Introductionmentioning

confidence: 99%

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting

Chen

Ren

et al. 2021

ChemSusChem

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Cerium (IV)-based metal-organic frameworks (MOFs) are highly desirable due to their unique potential in fields such as redox catalysis and photocatalysis. However, due to the high reduction potential of Ce IV species in solution, it is still a great challenge to synthesize Ce IV -MOFs with novel structures, which are extremely dominated by the hexanuclear CeÀ O cluster inorganic building units (IBUs). Herein, a CeÀ O IBU chain containing Ce IV -MOF, CSUST-3 (CSUST: Changsha University of Science and Technology), was successfully prepared using the kinetic stabilization study of UiO-66(Ce)-NDC (H 2 NDC = 2,6naphthalenedicarboxylic acid). Furthermore, owing to the superior redox activity, Lewis acidity and semiconductor-like behavior owing to Ce 4 + , activated CSUST-3 was demonstrated to be an excellent catalyst for CO 2 chemical fixation. One-pot synthesis of styrene carbonate from styrene and CO 2 was achieved under mild conditions (1 atm CO 2 , 80 °C, and solvent free). Moreover, activated CSUST-3 was shown to be a remarkable co-catalyst-free photocatalyst for overall water splitting (OWS), rendering 59 μmol g À 1 h À 1 of H 2 and 22 μmol g À 1 h À 1 of O 2 under simulated sunlight irradiation (Na 2 S-Na 2 SO 3 as sacrificial agent).

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Section: Introductionmentioning

confidence: 99%

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting

Chen

Ren

et al. 2021

ChemSusChem

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“…With the progressive increase in consumption of unsustainable resources (e.g., crude oil, coal, and natural gas), the global energy crisis has been much of an emergency ( Kittner et al, 2017 ; Wang et al, 2018 ; Sadhukhan et al, 2018 ; Ng et al, 2021 ). Many fossil fuels are exhausting rapidly with high emission of exhaust gases (e.g., carbon dioxide, sulfur dioxide, and nitric oxides); simultaneously, social and environmental problems such as acid rain and greenhouse effect are becoming more and more serious ( Zhang et al, 2015 ; Venkata Mohan et al, 2016 ; Zhao et al, 2018 ; Li et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Approaches to Selective Conversion of Cellulose Into 5-Hydroxymethylfurfural Promoted by Heterogeneous Acid Catalysts: A Review

2022

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5-Hydroxymethylfurfural (5-HMF) as a triply catalytic product is a value-added refining chemical in industry production. 5-HMF as biomass feedstock enables to be transformed into other high-value industrial compounds, such as 2,5-furandicarboxylic acid (FDCA), 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), 5-formyl-2-furancarboxylic acid (FFCA), 2,5-diformylfuran (DFF), 2,5-bis(aminomethyl)furan (BAMF), and 2,5-dimethylfuran (DMF). Hence, catalytic conversion of biomass into 5-HMF has been given much more attention by chemists. In this review, some latest studies about the conversion of cellulose to 5-HMF have been introduced systematically. Solid acids such as heterogeneous catalysts have been widely applied in the conversion of cellulose into 5-HMF. Therefore, some novel solid acids with Brønsted and/or Lewis acidic sites, such as sulfonated solid acids, carbon-based acids, and zeolite particles employed for biomass conversions are listed.

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“…Several technologies are available to produce H 2 , such as natural gas reforming, methanol reforming, and water splitting. Among them, photocatalytic water splitting, the conversion of pure water driven by solar energy into usable chemical energy (i.e., H 2 ), has garnered significant attention [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. However, pure water is scarce, which contradicts the purpose of deriving high-availability fuels.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Hydrogen Evolution from Artificial Seawater Splitting over Amorphous Carbon Nitride: Optimization and Process Parameters Study via Response Surface Modeling

Chee

Chew

et al. 2022

Materials

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Photocatalytic water splitting has garnered tremendous attention for its capability to produce clean and renewable H2 fuel from inexhaustible solar energy. Until now, most research has focused on scarce pure water as the source of H2, which is not consistent with the concept of sustainable energy. Hence, the importance of photocatalytic splitting of abundant seawater in alleviating the issue of pure water shortages. However, seawater contains a wide variety of ionic components which have unknown effects on photocatalytic H2 production. This work investigates photocatalytic seawater splitting conditions using environmentally friendly amorphous carbon nitride (ACN) as the photocatalyst. The individual effects of catalyst loading (X1), sacrificial reagent concentration (X2), salinity (X3), and their interactive effects were studied via the Box–Behnken design in response surface modeling towards the H2 evolution reaction (HER) from photocatalytic artificial seawater splitting. A second-order polynomial regression model is predicted from experimental data where the variance analysis of the regressions shows that the linear term (X1, X2), the two-way interaction term X1X2, and all the quadratic terms (X12, X22, X23) pose significant effects towards the response of the HER rate. Numerical optimization suggests that the highest HER rate is 7.16 µmol/h, achievable by dosing 2.55 g/L of ACN in 45.06 g sea salt/L aqueous solution containing 17.46 vol% of triethanolamine. Based on the outcome of our findings, an apparent effect of salt ions on the adsorption behavior of the photocatalyst in seawater splitting with a sacrificial reagent has been postulated.

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Photocatalytic water splitting for solving energy crisis: Myth, Fact or Busted?

Cited by 117 publications

References 143 publications

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting

Sustainable Approaches to Selective Conversion of Cellulose Into 5-Hydroxymethylfurfural Promoted by Heterogeneous Acid Catalysts: A Review

Photocatalytic Hydrogen Evolution from Artificial Seawater Splitting over Amorphous Carbon Nitride: Optimization and Process Parameters Study via Response Surface Modeling

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Photocatalytic water splitting for solving energy crisis: Myth, Fact or Busted?

Cited by 117 publications

References 143 publications

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO2 Chemical Fixation and Photocatalytic Overall Water Splitting

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO2 Chemical Fixation and Photocatalytic Overall Water Splitting

Sustainable Approaches to Selective Conversion of Cellulose Into 5-Hydroxymethylfurfural Promoted by Heterogeneous Acid Catalysts: A Review

Photocatalytic Hydrogen Evolution from Artificial Seawater Splitting over Amorphous Carbon Nitride: Optimization and Process Parameters Study via Response Surface Modeling

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A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting