SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2026
·
IF 6.6
Zongze Lv,Lean Xian,Fanmu Meng,Jinqi Yang,Xiang Huang,Keyan Sun
Integrating carbon capture with solar energy storage offers a promising pathway toward carbon neutrality, yet the synergistic utilization of carbonaceous materials from capture processes remains underexplored. Herein, we fabricate a flexible phase change film (PCF) using porous carbon derived from the reciprocal carbon–carbonate co-calcination (RCCC) of bamboo biochar and limestone. During RCCC, 93.2% of CO 2 released from limestone is converted to CO. The optimized PCF composed of BC, thermoplastic polyurethane, and microencapsulated eicosane achieves a phase change enthalpy of 123.87 J g −1 , excellent leakage-proof and mechanical stability. The photothermal conversion efficiency can reach 85.5%. This work demonstrates the first integration of RCCC-based carbon capture with flexible photothermal energy storage, offering a viable route for upgrading captured carbon into functional solar-thermal materials.
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Journal of the Korean Ceramic Society
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2026
·
IF 4.4
Song Xiao-jie,Weng Tong-juan,Li Jing-wen,Dong Wei-wei,Sun Yue,Liu Shuai-peng,Oh Won-Chun
Photocatalytic reduction of CO 2 into chemical fuels under visible light has garnered increasing attention. Herein, we designed silver nanoparticle (Ag NPs)/carbon quantum dot (CQDs)/TiO 2 nanotubes (TNTs) nanocomposites via a hydrothermal process combined with an in-situ photod-eposition method. Results of methylene blue photodegradation tests under visible light demonstrated that Ag/CQDs/TNTs exhibited higher photocatalytic efficiency than pristine TNTs. In addition, in the carbon dioxide photoreduction experiment, the optimized Ag/CQDs/TNTs has a photocatalytic yield of 38.33 µmol g -1 h -1 when carbon dioxide is converted into carbon monoxide, which is 5.3 times that of pure TNTs. Detailed experimental characterizations revealed that the enhanced photocatalytic performance of Ag/CQDs/TNTs stemmed from the surface plasmon resonance effect of Ag NPs and the excellent optoelectronic properties of CQDs. This work offers insights for fabricating ternary catalysts for photocatalytic CO 2 reduction.
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AICHE JOURNAL
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2026
·
IF 4.4
Yajie Yu,Haiyi Chen,Kaiji Xu,Jinxin He,Bin Chen,Kok Bing Tan,Dongren Cai,Guowu Zhan
Conventional supported Cu catalysts for the reverse water-gas shift (RWGS) reaction suffer from activity-selectivity trade-offs and stability issues. Herein, we report a carrier-free Cu catalyst (bio-Cu) synthesized via a pollen-templated strategy. The template creates a hierarchical porous framework and enables in situ carbon doping (~4 wt%), ensuring homogeneous Cu dispersion and inhibiting agglomeration. In the RWGS reaction, the bio-Cu catalyst exhibits outstanding performance, achieving >99.1% CO selectivity with 25.3% CO 2 conversion at 340°C and 3 MPa, approximately 3.2 times higher than a conventional Cu benchmark. Under ambient pressure at 450°C, it maintains 30.5% conversion with 99.99% CO selectivity and shows exceptional stability over 100 h. Mechanistic studies reveal that carbon doping generates electron-deficient Cu δ+ species and promotes a synergistic carbon cycle that operates alongside the conventional redox pathway, collectively enhancing the catalytic efficiency. This work provides new insights into the rational design of high-performance, carrier-free CO 2 hydrogenation catalysts.
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Chem
·
2026
·
IF 19.1
Shuxia Liu,Jixian Hu,Jiarui Liu,Zijie Lin,Shuo Wang,Hao Sun,Yinghe Zhao,Qing Li,Tanyuan Wang
Developing a Cu-free electrocatalytic system for CO 2 reduction toward a multi-carbon product remains challenging due to the limited understanding of C–C coupling. Herein, an Ag/Cr 2 O 3 heterostructure is reported to achieve selective ethanol electrosynthesis from CO 2 with anions to modulate the electrocatalytic interfaces. The performance of Ag/Cr 2 O 3 follows the trend of ClO 4 − > NO 3 − > NO 2 − > HCO 3 − /HPO 4 2− /SO 4 2− for different anions, which is similar to the tendency of Hofmeister anions to disrupt water’s structure. Notably, Ag/Cr 2 O 3 exhibits a faradaic efficiency (FE) ethanol of 51.8% with a stable response at ∼160 mA cm −2 in a flow cell containing ClO 4 − . In situ characterizations and theoretical calculations demonstrate that ClO 4 − reduces the number of interfacial hydrogen bonds, thus inhibiting hydrogen evolution. While the Ag-Cr asymmetric sites stabilize the C–C coupling intermediates and favor the ethanol pathway over ethylene, this enables selective ethanol generation. This work extends the approach for multi-carbon generation from CO 2 .
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MOLECULES
·
2026
·Vol. 31
·期 12
·1997
·
IF 5.1
Fang Shi,Weibin Jin,Jingchun Wu,Bo Zhao,Chunlong Zhang,Lifeng Mao
To address gas channeling, low sweep efficiency, and water sensitivity in CO2flooding of shale reservoirs, amidine-functionalized graphene quantum dots (FN-GQDs) were synthesized via amidation of citric acid-derived GQDs. FTIR and UV-Vis confirmed successful grafting. Conductometric titration showed an optimal reaction time of 24 h with a grafting ratio of 58%, in good agreement with the 60% saturation predicted by molecular dynamics simulation. Upon CO2introduction, protonation of amidine groups induced a nonlinear viscosity increase from 0.298 to 2.0 mPa·s at 0.02 wt% via electrostatic attraction and hydrogen bonding, forming a dynamic crosslinking network. FN-GQDs maintained low oil-water interfacial tension of 0.12–0.25 mN/m at 80–120 °C and rapidly reversed rock wettability from strongly oil-wet to water-wet, reducing the contact angle from 141.7° to 38.9° within 80 min. The positively charged surface inhibited clay swelling, achieving 92% at 0.20 wt%. Core flooding and NMR T2spectra revealed that alternating CO2and FN-GQDs injection at a 2:1 gas–water ratio achieved a final oil recovery of 52.5%, significantly higher than pure CO2flooding. Through synergistic effects of interfacial tension reduction, wettability alteration, viscosity enhancement, and anti-swelling, FN-GQDs improve microscopic displacement efficiency and macroscopic sweep volume, showing great potential for CO2-enhanced oil recovery in shale reservoirs.
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Jiahui Zhou,Ziyi Zhang,Chenghao Jin,ShanShan Tong,Yunteng Qu
Electrochemical CO2 reduction reaction (CO2RR) to diverse high-value chemicals represents a promising carbon mitigation strategy, yet precisely controlling product selectivity remains a considerable challenge. Herein, we report a size-dependent Cu/CN catalyst for modulating the selectivity of CO2RR. Specifically, small Cu NPs on CN (∼5 nm, S–Cu/CN) achieved a 76.2% C2+ product selectivity at 0.6 A cm–2, while the large one (∼50 nm, L-Cu/CN) reached a 67.5% CH4 selectivity at 0.6 A cm–2. Physical characterizations revealed that S–Cu/CN displays partial Cu+ sites, whereas L-Cu/CN higher Cu+ content. Mechanism analysis revealed a balanced Cu0/Cu+ ratio in S–Cu/CN promotes C–C coupling at Cu+ sites to form C2+ products. Conversely, higher Cu+ content in L-Cu/CN decreased the *CO coverage and improved H2O dissociation, steering continuous hydrogenation toward CH4 generation. This work offers a novel strategy to design high-efficiency CO2RR electrocatalysts toward desired products.
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ChemSusChem
·
2026
·Vol. 19
·期 11
·e70761
·
IF 5.9
Hengrui Zuo,Luting Wang,Yaoxuan Li,Tiantian Wang,Liya Zhou,Xiaobing Zheng,Yunting Liu,Guanhua Liu,Yanjun Jiang
To meet the global pursuit of carbon neutrality, electroenzymatic reduction of CO 2 has been a potential technology that can convert CO 2 into useful chemicals or fuels. However, the low solubility of CO 2 in water inhibits the reaction rate, and free enzyme suffers from poor stability and reusability and requires the expensive cofactor NADH. Herein, a spherical covalent organic framework (COF) TPB-DMTP was synthesized for both CO 2 enrichment and enzyme immobilization. The electron mediator neutral red was covalently attached to a carbon paper electrode for electrochemical NADH regeneration, thereby avoiding damage to the enzyme. The constructed electrocatalytic NADH regeneration was coupled with enzyme-catalyzed CO 2 reduction. After immobilizing formate dehydrogenase (FDH) in the COF, the CO 2 was enriched near the enzyme molecules, and the stability and reusability of enzyme were enhanced. The optimized system produced up to 2.312 mM formate, which was 4.01 times that of the free enzyme system. Graphical This study synthesized the spherical covalent organic framework (COF) TPB-DMTP, which concurrently possesses CO 2 enrichment and enzyme immobilization capabilities. Electrochemical NADH regeneration was achieved by covalently grafting the electron mediator neutral red onto a carbon paper electrode. The constructed electrocatalytic NADH regeneration system was coupled with an enzyme-catalyzed CO 2 reduction reaction. Immobilization of formate dehydrogenase (FDH) onto the COF significantly enhanced the enzyme's stability and reusability. The optimized system yielded up to 2.312 mM formate, representing a 4.01-fold increase over the free enzyme system.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 29
·15687-15698
·
IF 3.9
Xu Shunlong,Chi Shudan,Wang Xirui,Liu Junteng,Jin Junsu,Mi Jianguo
CO 2 capture is a critical technology for mitigating
global climate change. This study systematically investigates the
low-concentration CO 2 capture performance of (dtz)CALF-20,
constructed by zinc, oxalic acid, and diaminotriazole, specifically
designed for CO 2 capture from confined spaces. By constructing
specific adsorption sites via nitrogen-rich diaminotriazole ligands,
the material achieves efficient capture of low-concentration CO 2 . To overcome the limitations of (dtz)CALF-20-hydrotherm from
conventional hydrothermal synthesis, which relies heavily on organic
solvents and is energy-intensive, this work introduces an innovative
(dtz)CALF-20-mechchem synthesized by a room-temperature mechanochemical
ball-milling method. The green approach not only facilitates scalable
production but also enables the rapid preparation of (dtz)CALF-20-mechchem,
achieving a high space-time yield (STY) of 4600 kg·m –3 ·d –1 and a yield of 98%, which are approximately
28 times and 1.3 times higher than those of the traditional (dtz)CALF-20-hydrotherm.
It is shown that (dtz)CALF-20-mechchem exhibits excellent adsorption
performance at 5000 ppm of CO 2 , achieving an adsorption
capacity of 1.40 mmol/g, representing a 21.7% enhancement when compared
with that of (dtz)CALF-20-hydrotherm. After being shaped into spherical
pellets with sodium alginate, the material effectively reduces the
bed pressure drop, making it more suitable for industrial applications,
while retaining 95% of its original CO 2 adsorption performance.
Dynamic breakthrough experiments reveal an exceptional CO 2 /N 2 selectivity of 936, which means an approximately 11-fold
enhancement over that of (dtz)CALF-20-hydrotherm. This work presents
a promising strategy for the green and scalable production of high-performance
metal–organic frameworks (MOFs) adsorbents, significantly advancing
their practical application.
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ENERGY & FUELS
·
2026
·Vol. 40
·期 29
·15949-15957
·
IF 6
Wang Xinmei,Ni Jianing,Han Junqiang,Qin Changlei
With the global boom in lithium-ion
battery (LIB) deployment, the
massive production of end-of-life LIBs has become a significant challenge
for resource recycling and environmental risk mitigation. Concurrently,
the advancement of carbon capture is driving an urgent demand for
low-cost, high-performance CO 2 sorbents, among which Li 4 SiO 4 stands out as a promising candidate. A critical
insight is that impurities such as K and Na, which are traditionally
costly to remove during LIB recycling, act as effective dopants to
enhance CO 2 adsorption of Li 4 SiO 4 . To address these dual needs, this work proposes an innovative strategy
for the direct reduction of spent ternary cathode materials via biomass
pyrolysis. By utilizing the synergistic effects of reductive gases
and biochar generated in situ during pyrolysis, Li 2 CO 3 doped with Na and K is recovered and integrated into Li 4 SiO 4 sorbents. Systematic optimization identifies
corn stover (20 wt % addition) as the optimal biomass feedstock, with
pyrolysis-reduction at 650 ° C for 60 min as the ideal condition.
The resulting sorbent exhibits exceptional durability, retaining a
high CO 2 capacity of 0.190 g/g after 80 consecutive adsorption-desorption
cycles. More notably, its production cost is only 19% of that via
conventional routes. This study provides a sustainable pathway for
valorizing spent LIBs while enabling the scalable preparation of CO 2 sorbents, bridging the gap between LIBs’ recycling
and CCUS advancement.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xinyue Chen,Xin Yang,Qiuzhong Li,Chengwei Qiu,Jinni Shen,Wenxin Dai,Zizhong Zhang
This dual-site strategy offers a new route for steering CO 2 reduction and catalyst design. • Synergistic dual sites boost charge transfer, CO 2 adsorption, and *OCH 3 formation. • Cobalt-based porphyrin (CoTCPP) sites on graphitic carbon nitride accounts for CO 2 reduction into CH 4 . • Ag/CoTCPP dual sites achieve 340-fold higher than graphitic carbon nitride photocatalyst for CO production. Graphitic carbon nitride (g-C 3 N 4 ) was identified as a highly promising catalyst for the photocatalytic reduction of CO 2 . However, its performance was limited by a lack of highly efficient active sites for photogenerated electron accumulation and CO 2 adsorption/activation. In this study, a cobalt porphyrin (CoTCPP) and Ag dual-active-site co-modified CNN (CoTCPP/Ag/CNN) was prepared for boosting photocatalytic CO 2 reduction. When the Ag loading was 1 wt% and the CoTCPP loading was 0.5 wt%, the catalyst exhibited optimal activity, with CO and CH 4 yields reaching 67.8 μmol g −1 ·h −1 and 10.4 μmol·g −1 ·h −1 , respectively, whereas pure CNN produced only 0.2 μmol·g −1 ·h −1 of CO. The experimental results indicated that the dual-type sites not only effectively enhanced the photo-generated carrier mobility, but also significantly strengthened the CO 2 adsorption and activation, and promoted the formation of the key intermediate *OCH 3 , thereby markedly improving the efficiency of CO 2 photoreduction. This study proposed a novel strategy for the rational design of dual active sites on catalyst surfaces and the regulation of CO 2 reduction reaction pathways.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Kai Liu,Ziling Liu,Tuanhui Li,Wasim Afzal Muhammad,Xue Liu,Dongbin Dang,Yan Bai
Developing highly efficient single-atom catalysts (SACs) with optimal active-site utilization remains challenging. In this study, a hollow macroporous-mesoporous catalyst composed of iron single atoms supported on nitrogen-doped carbon (Fe/NC) was synthesized using silica microspheres as a sacrificial template and dopamine hydrochloride as a bifunctional C/N source and iron-anchoring ligand, and applied to the CO 2 cycloaddition reaction. According to the experimental results, the Fe/NC catalyst demonstrates exceptional performance in the cycloaddition reaction of styrene oxide with CO 2 , achieving a high yield of 97.45 ± 0.33% (turnover frequency (TOF) = 38.19 h −1 ), despite having an extremely low iron loading of only 1.36 ± 0.01 wt%. This is attributed not only to the superior intrinsic catalytic activity of the Fe N 4 active sites but also to the hollow mesoporous structure with a high specific surface area, which provides stable metal anchoring sites to effectively suppress iron atom aggregation, promotes continuous release of substrates and CO 2 , enhances product diffusion, and thereby improves catalytic efficiency. In addition, the Fe/NC catalyst demonstrates excellent cycling stability, maintaining a high conversion efficiency of 93.26 ± 0.52% after five consecutive recycling tests while preserving its structural integrity. Moreover, the Fe/NC catalyst exhibits broad substrate compatibility. This work provides a theoretical basis for synthesizing porous C/N materials with single-atom loading to achieve efficient catalytic conversion of carbon dioxide Download: Download high-res image (139KB) Download: Download full-size image
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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Hongyang Zhang,Hongbin He,Yuqi Ren,Ruoxuan Peng,Pengyu Fei,Jiancheng Zhou,Naixu Li
The efficient synthesis of C 2 fuels via artificial photosynthesis confronts persistent challenge in dilute CO 2 environments. To address this, we engineered a photothermal catalyst incorporating spatially confined Cu/Au alloy nanoclusters on CeO 2 nanorods. The design establishes an atomically precise Ce − O − Au − Cu charge cascade, where directional photothermal energy transfer governs the C − C coupling pathway. Mechanistic studies reveal that Cu sites within the Cu/Au alloy enhance Au-driven localized surface plasmon resonance (LSPR), broadening the spectral response while accelerating hot electron transfer for CO 2 activation. Simultaneously, adjacent Cu sites stabilize co-adsorbed *CO intermediates, directing C − C coupling to form the key *OCCO intermediate, while the Ce − O − Au interface mediates hole-transfer-driven H 2 O oxidation predominantly at Au centers. Integrated theoretical calculations and in situ DRIFTS confirm the kinetic and thermodynamic superiority of the *OCCO pathway over both the *CHO pathway and CO desorption. Under concentrated solar irradiation, this catalyst achieves a C 2 H 4 yield of 110.45 µmol·g −1 ·h −1 (a 20.2-fold increase over non-concentrated conditions), with C 2 selectivity rising from 0% to 78%. Solar-to-chemical conversion (STC) efficiency increases 13.3-fold to 1.25‰. This work elucidates the atomistic mechanism of photothermal coupling-driven directional C − C coupling, providing a generalizable design strategy for efficient carbon–neutral fuel synthesis.
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