Photocatalytic CO<sub>2</sub>reduction by H<sub>2</sub>O: insights from modeling electronically relaxed mechanisms

Poudyal, Samiksha; Laursen, Siris

doi:10.1039/c8cy02046a

Cited by 24 publications

(26 citation statements)

References 84 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CO 2 is a greenhouse gas and CO 2 emissions cause global warming and climate change. Photocatalytic CO 2 reduction has received tremendous attention because it offers a clean strategy to transform CO 2 into valuable chemicals/fuels 81‐83 . Halide perovskites have recently received increasing attentions in photocatalytic CO 2 reduction reaction because of their intriguing optoelectrical properties.…”

Section: Photocatalytic Applications Of Halide Perovskite Compositesmentioning

confidence: 99%

Halide perovskite composites for photocatalysis: A mini review

Luo¹,

Zhang²,

Yang

et al. 2021

EcoMat

View full text Add to dashboard Cite

Halide perovskites have attracted increasing scientific interests for photocatalysis because of their remarkable opto‐electronic properties, such as optimal band structures, long charge carrier lifetimes, high photoluminescence quantum yields, and so on. However, pure halide perovskites generally face problems of low stability, lack of active sites, and ineffective extraction of carriers, which limit their applications in photocatalytic reactions. To improve the photocatalytic activity and stability, halide perovskites are composited with other materials. Herein in this mini review, we summarize the recent progresses on the design and development of halide perovskite composites for various photocatalytic reactions including photocatalytic CO2 reduction reaction, photocatalytic hydrogen evolution reaction, photocatalytic pollutant degradation reaction, and so on. Finally, an outlook of halide perovskite for photocatalysis is provided to point up the future challenges and the possible solutions.

show abstract

Section: Photocatalytic Applications Of Halide Perovskite Compositesmentioning

confidence: 99%

Halide perovskite composites for photocatalysis: A mini review

Luo¹,

Zhang²,

Yang

et al. 2021

EcoMat

View full text Add to dashboard Cite

show abstract

“…In the past few years, a shift has been occurring where researchers have started to ask fundamental questions about the CO 2 photoreduction process. These questions include the following: What are the best analytical methods to track CO 2 photoreduction and what products, besides CH 4 and CO, are being formed from CO 2 photoreduction? What is the best mechanism for describing CO 2 photoreduction? What is the driving energy behind the CO 2 photoreduction mechanism? , What are the critical process parameters for CO 2 photoreduction? , What is the best experimental protocol for comparing photocatalysts for CO 2 photoreduction? …”

Section: Introductionmentioning

confidence: 99%

“…This is a significant challenge, because it must address, in full or in part, the challenges listed above. There are limited examples of CO 2 photoreduction kinetic studies. ,− Currently, there are no examples describing an intrinsic CO 2 photoreduction kinetic model. An intrinsic model is extremely useful, because it is not scale-dependent as it describes the kinetics of a system where all active sites on the photocatalyst have an equal probability of participating in the reaction.…”

Section: Introductionmentioning

confidence: 99%

Review and Analysis of CO₂ Photoreduction Kinetics

Thompson

Fernández

Maroto‐Valer

2020

ACS Sustainable Chem. Eng.

116

View full text Add to dashboard Cite

Microkinetic, in situ analytics, and empirical modeling approaches for developing intrinsic CO2 photoreduction kinetics are presented in this Perspective. Intrinsic kinetic models that are independent of photoreactor geometry are critical for scaling CO2 photoreduction photoreactors. Successfully scaling CO2 photoreduction is limited using the current extrinsic CO2 photoreduction kinetic models described in this Perspective, because they are dependent on the photoreactor geometry and scale used. The impact of different photoreactor geometries and light transport that lead to extrinsic kinetic models is reviewed. The impacts of temperature and pressure on surface diffusion is highlighted as additional important process parameters. The current Langmuir–Hinshelwood-based kinetic models are discussed, and their limitations are highlighted, with respect to modeling the possible deactivation of the photocatalyst. With a view on developing an intrinsic kinetic model, the challenges for developing CO2 photoreduction kinetics are highlighted and discussed with reference to the current extrinsic CO2 photoreduction kinetic model examples found in the literature. Robust analytical methods for collecting CO2 photoreduction kinetic data and for confirming the carbon source are discussed. The false positive production from adventitious carbon and organic impurities introduced during the synthesis and/or coating of photocatalysts with solvents and degradation of photoreactor components is highlighted as a challenge to collecting CO2 photoreduction kinetic data. It is shown that a wide range of the kinetic model coefficient values are possible when using a multistart, genetic algorithm, or particle swarm approach for estimating nonlinear model coefficients. Finally, an easy to test and implement approach using a mean median multistart and trust-region reflective algorithm method is presented for the estimation of nonlinear CO2 photoreduction kinetic model coefficients.

show abstract

“…[27] . Another approach involves reduction of CO 2 in a heterogeneous system, with additional research including electroreduction [28][29][30][31][32][33][34][35][36][37][38][39][40] and photoreduction of CO 2 [29,36,[41][42][43][44] . Many of these effort s have been reviewed extensively [18,19,21,22,[45][46][47][48][49][50][51][52][53][54][55][56] ; therefore, this perspective will concentrate on advantages and challenges of heterogeneous and homogeneous approaches introduced since 2015, with only minor mention of the electrocatalytic reduction, and will only discuss details of the most pertinent references.…”

Section: Hcoo H (L)mentioning

confidence: 99%

“…Comparison between various methods of synthesis of FA/FS. Mostly based on precious metals[21][22][23][24][45][46][47][48][49]57,58] • Poor solubility of catalysts in aqueous systems • Requires presence of base, which leads to FS and not FA • Very often, use of expensive bases • Very few water-based systems exist Heterogeneous• Low selectivity toward desired product[45,51,53,54,55,57] • Catalyst may be poisoned by one of the products (CO) Electroreduction• High energy consumption due to the slow kinetics[41,46,59] • Needs high over-potential • Low product selectivity (in water, reduction of CO 2 competes with the H 2 evolution reaction) Photoreduction• Dependent on the presence of photosensitizer[43,46,57] • Often use the ultraviolet light Hydrogen capacities of selected FS at their solubility limits at 20 °C.…”

mentioning

confidence: 99%