Dynamic traction of lattice-confined platinum atoms into mesoporous carbon matrix for hydrogen evolution reaction

Zhang, Huabin; An, Pengfei; Zhou, Wei; Guan, Buyuan; Zhang, Peng; Dong, Juncai; Lou, Xiong Wen David

doi:10.1126/sciadv.aao6657

Cited by 514 publications

(336 citation statements)

References 53 publications

Supporting

Mentioning

325

Contrasting

Unclassified

Order By: Relevance

“…Moreover, a porous N‐doped carbon substrate with good stability, high conductivity, and porosity has been served as suitable support to capture single Pt atoms for electrocatalysis. Very recently, Lou and co‐workers have realized single Pt atoms anchored on N‐doped porous carbon matrix (PCM) (Figure C) . The single Pt atoms were coordinated with adjacent carbon or nitrogen atoms in lattice‐confined geometry.…”

Section: Defects‐based Single Atomic Electrocatalystmentioning

confidence: 99%

See 1 more Smart Citation

Defect‐Based Single‐Atom Electrocatalysts

et al. 2018

View full text Add to dashboard Cite

Single‐atom catalysts (SACs) have attracted great attention owing to their maximum atomic utilization and high catalytic performance in electrochemical reactions. But the synthesis of SACs is not easy due to large surface energies of single atomic metal sites which often lead to their aggregation. The defects on supports can serve as anchor sites to stabilize single metal atoms and prevent them from aggregation, which has become an effective method to fabricate SACs. This review summarizes the meaningful findings about the defects on supports stabilizing single metal atoms, and their applications in electrocatalytic reaction. Various defects, including the intrinsic defects or heteroatom doping of carbon‐based materials, cation or anion vacancies of metal compound supports, and other defects (step edges, lattice defects, and caves), are comprehensively summarized, and the effects of defects on designing SACs are discussed. Although there are still many challenges to fully explore the SACs, it is believed that the newly established defect sites stabilized single atoms mechanism will be helpful for designing and fabricating highly powerful single atomic electrocatalysts for practical applications.

show abstract

Section: Defects‐based Single Atomic Electrocatalystmentioning

confidence: 99%

Section: Defects‐based Single Atomic Electrocatalystmentioning

confidence: 99%

Defect‐Based Single‐Atom Electrocatalysts

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Fu and colleagues have integrated CdS with MoS 2 and obtained much improved hydrogen evolution activity. [25,26] Herein, a bottom-up strategy is developed to decorate ultrasmall molybdenum-oxygen (MoO x ) clusters onto the surface of CdS nanowires (NWs). [18][19][20] Thus, designing novel materials which can address these problems may lead to the discovery of non-noble metal cocatalysts with enhanced performance.…”

mentioning

confidence: 99%

Ultrasmall MoO_x Clusters as a Novel Cocatalyst for Photocatalytic Hydrogen Evolution

et al. 2018

Self Cite

View full text Add to dashboard Cite

of semiconductor photocatalysts to retard the recombination of charge carriers and enhance surface reaction rates. [13][14][15] Among various kinds of cocatalysts, Pt often shows the best performance. However, practical application of Pt-based cocatalysts is limited by their scarcity and high cost. [16] Therefore, development of highly active and cost-efficient alternatives to Pt is urgently needed. A large number of transition metals (e.g., iron, cobalt, nickel, molybdenum, and tungsten) and their derivative compounds have been studied. Fu and colleagues have integrated CdS with MoS 2 and obtained much improved hydrogen evolution activity. [17] However, the performances of which are still far from satisfactory because of the low active surface areas and sluggish separation of electron-hole pairs. [18][19][20] Thus, designing novel materials which can address these problems may lead to the discovery of non-noble metal cocatalysts with enhanced performance. Metal oxide clusters, constructed by a small number of atoms, can largely expose active metal sites. [21] Moreover, when loaded onto semiconductor photocatalysts, metal oxide clusters can induce discrete energy bands to trap charge carriers and promote the separation of electrons and holes. Regarding such unique properties, cluster cocatalysts show the potential to boost the activity of semiconductor photocatalysts for solar water splitting.The performance of cluster cocatalysts is significantly influenced by the number and coordination environment of the active atoms. [22][23][24] Therefore, it is essential to establish a synthetic method to precisely control the configuration of clusters decorated on the surface of semiconductor photocatalysts at atomic level. [25,26] Herein, a bottom-up strategy is developed to decorate ultrasmall molybdenum-oxygen (MoO x ) clusters onto the surface of CdS nanowires (NWs). The decorated clusters with finely controlled size and configuration greatly enhance the photocatalytic H 2 evolution efficiency of CdS NWs.CdS NWs are first synthesized through a solvothermal approach. [27] X-ray diffraction (XRD) pattern of as-prepared sample shows characteristic peaks of CdS with hexagonal wurtzite crystal structure ( Figure S1, Supporting Information). Field-emission scanning electron microscope (FESEM), transmission electron microscope (TEM), and high-resolution TEM (HRTEM) images indicate the successful synthesis of CdS NWs with good crystallinity (Figure S2, Supporting Information). The average diameter of the CdS NWs is about 75 nm (Figure S3, Supporting Information). MoO x clusters are then decorated To enhance the performance of semiconductor photocatalysts, cocatalysts are used to accelerate surface reactions. Herein, ultrasmall molybdenumoxygen (MoO x ) clusters are developed as a novel non-noble cocatalyst, which significantly promotes the photocatalytic hydrogen generation rate of CdS nanowires (NWs). As indicated by extended X-ray absorption fine structure analysis, direct bonds are formed between CdS NWs and MoO x clusters,...

show abstract

“…[ Compared to the development of metal-free carbon materials in ORR, metal-doped carbon materials have received even more attention, in which the metal atoms can be well dispersed in the resultant porous carbon, leading to an improved density of active sites. [87,88] It has been recognized that the M-N x moieties in M-N-C (also known as single-atom catalysts,S ACs) are the real active sites for ORR. [89,90] The interaction between oxygen molecules and the 3d orbital of metals plays ac ritical role in boosting ORR activity,w hich can facilitate the charge transfer from metal to O 2 p*orbitals and activate the oxygen molecules to promote the subsequent reduction of oxygen.…”

Section: Angewandte Chemiementioning

confidence: 99%

Metal–Organic Frameworks Based Electrocatalysts for the Oxygen Reduction Reaction

et al. 2019

Self Cite

View full text Add to dashboard Cite

In view of the clean and sustainable energy, metal–organic frameworks (MOFs) based materials, including pristine MOFs, MOF composites, and their derivatives are emerging as unique electrocatalysts for oxygen reduction reaction (ORR). Thanks to their tunable compositions and diverse structures, efficient MOF‐based materials provide new opportunities to accelerate the sluggish ORR at the cathode in fuel cells and metal–air batteries. This Minireview first provides some introduction of ORR and MOFs, followed by the classification of MOF‐based electrocatalysts towards ORR. Recent breakthroughs in engineering MOF‐based ORR electrocatalysts are highlighted with an emphasis on synthesis strategy, component, morphology, structure, electrocatalytic performance, and reaction mechanism. Finally, some current challenges and future perspectives for MOF‐based ORR electrocatalysts are also discussed.

show abstract

Dynamic traction of lattice-confined platinum atoms into mesoporous carbon matrix for hydrogen evolution reaction

Cited by 514 publications

References 53 publications

Defect‐Based Single‐Atom Electrocatalysts

Defect‐Based Single‐Atom Electrocatalysts

Ultrasmall MoO_x Clusters as a Novel Cocatalyst for Photocatalytic Hydrogen Evolution

Metal–Organic Frameworks Based Electrocatalysts for the Oxygen Reduction Reaction

Contact Info

Product

Resources

About

Dynamic traction of lattice-confined platinum atoms into mesoporous carbon matrix for hydrogen evolution reaction

Cited by 514 publications

References 53 publications

Defect‐Based Single‐Atom Electrocatalysts

Defect‐Based Single‐Atom Electrocatalysts

Ultrasmall MoOx Clusters as a Novel Cocatalyst for Photocatalytic Hydrogen Evolution

Metal–Organic Frameworks Based Electrocatalysts for the Oxygen Reduction Reaction

Contact Info

Product

Resources

About

Ultrasmall MoO_x Clusters as a Novel Cocatalyst for Photocatalytic Hydrogen Evolution