Transition‐Metal Nitride Core@Noble‐Metal Shell Nanoparticles as Highly CO Tolerant Catalysts

Garg, Aaron; Milina, Maria; Ball, Madelyn R.; Zanchet, Daniela; Hunt, Sean T.; Dumesic, James A.; Román‐Leshkov, Yuriy

doi:10.1002/anie.201704632

Cited by 89 publications

(89 citation statements)

References 40 publications

(58 reference statements)

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“…Metal nitrides, a large class of metal compounds where nitrogen has a formal oxidation state of ‐3, have received great attention owing to their high chemical stability and physical properties including hardness, thermal stability, and electrical conductivity . Every early transition‐metal nitride exhibits its own unique properties, which would certainly extend to a wider range of properties when synthesizing these materials with a combination of transition metals.…”

Section: Methodsmentioning

confidence: 99%

Mechanochemical‐Assisted Synthesis of High‐Entropy Metal Nitride via a Soft Urea Strategy

et al. 2018

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Crystalline high-entropy ceramics (CHC), a new class of solids that contain five or more elemental species, have attracted increasing interest because of their unique structure and potential applications. Up to now, only a couple of CHCs (e.g., high-entropy metal oxides and diborides) have been successfully synthesized. Here, a new strategy for preparing high-entropy metal nitride (HEMN-1) is proposed via a soft urea method assisted by mechanochemical synthesis. The as-prepared HEMN-1 possesses five highly dispersed metal components, including V, Cr, Nb, Mo, Zr, and simultaneously exhibits an interesting cubic crystal structure of metal nitrides. By taking advantage of these unique features, HEMN-1 can function as a promising candidate for supercapacitor applications. A specific capacitance of 78 F g is achieved at a scan rate of 100 mV s in 1 m KOH. In addition, such a facile synthetic strategy can be further extended to the fabrication of other types of HEMNs, paving the way for the synthesis of HEMNs with attractive properties for task-specific applications.

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Section: Methodsmentioning

confidence: 99%

Mechanochemical‐Assisted Synthesis of High‐Entropy Metal Nitride via a Soft Urea Strategy

et al. 2018

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“…Ammonia, as an abundant and cheap resource, is often adopted in the N-doping and nitridation process. [21][22][23][24] Interestingly, some studies reported that OVs could be formed in N-doped TMOs during ammonia treatment. [25][26][27] However, OV-enriched TMOs without N-doping obtained through ammonia treatment is still unreported.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Nature of Ammonia Treatment to Synthesize Oxygen Vacancy-Enriched Transition Metal Oxides

Liu

Wang

et al. 2019

Chem

179

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Oxygen vacancies (OVs) have emerged as an important strategy to modulate the electronic structures, conductivity, and catalytic performance of transition metal oxides (TMOs). A few studies reported that OVs could be formed in N-doped TMOs during ammonia treatment. However, the OV-enriched TMOs without N-doping obtained through ammonia treatment are still unreported and their mechanism is unclear. Herein, we adopt experimental and theoretical investigations to demonstrate the mechanism of ammonia treatment. Based on this mechanism, we develop a facile method to synthesize OV-enriched blue WO 3Àx porous nanorods (OBWPN) without N-doping. OBWPN exhibit promising performance for photothermal reduction of CO 2 -H 2 O to CH 4 without any external cocatalysts or sacrificial agents. In addition, the low-temperature ammonia-assisted reduction treatment is a universal strategy to generate OVs in other TMOs with enhanced performance of photocatalytic hydrogen generation. This work is significant for understanding the nature of ammonia treatment and promoting the wide application of OV-enriched TMOs.

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“…[7] Among the tested catalysts, noble metals (especially platinum) are extremely efficient heterogeneous catalysts. [8] Although platinum plays apivotal role in heterogeneous catalysis,i ti sr are and is without adequate alternatives. [9] To address the problem, av ariety of supported Pt catalysts have been used for the catalytic conversion of CO into CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Eye‐Readable Detection and Oxidation of CO with a Platinum‐Based Catalyst and a Binuclear Rhodium Complex

Cao

Duan

et al. 2019

Angew Chem Int Ed

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Toxic gases that are colorless and odorless,s uch as CO,a re am ajor environmental concern and require early detection to prevent serious toxicological effects.I nt his study, aunique system (Pt/HMSs-BRC) was fabricated by combining ac atalyst (Pt/hollow mesoporous silica spheres,P t/HMSs) with as ilica gel containing an adsorbed chromogenic probe (binuclear rhodium complex, BRC). The process is as imple method to prepare well-dispersed and uniform Pt nanoparticles.T he Pt/HMSs-BRC materials demonstrated early CO detection and excellent catalytic performance for CO oxidation. The probe exhibited remarkable color modulation from gray-violet to light-yelloww hen exposed to CO concentration levels above5 0ppm, and the color of the chromogenic probe was fully recoverable.B yakinetics-assisted discrimination method and DFT calculations,itw as found that the corner Pt sites are the dominant active sites for CO oxidation.

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Transition‐Metal Nitride Core@Noble‐Metal Shell Nanoparticles as Highly CO Tolerant Catalysts

Cited by 89 publications

References 40 publications

Mechanochemical‐Assisted Synthesis of High‐Entropy Metal Nitride via a Soft Urea Strategy

Mechanochemical‐Assisted Synthesis of High‐Entropy Metal Nitride via a Soft Urea Strategy

Understanding the Nature of Ammonia Treatment to Synthesize Oxygen Vacancy-Enriched Transition Metal Oxides

Eye‐Readable Detection and Oxidation of CO with a Platinum‐Based Catalyst and a Binuclear Rhodium Complex

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