ACS Applied Electronic Materials
·
2024
·
IF 4.3
Thao Phuong Nguyen,Tam Thi My Luu,Duy Huynh Minh Nguyen,Dan Trung Tu,Son Truong Nguyen,Van Thi Thanh Ho
In the face of a global energy crisis exacerbated by the adverse impacts of fossil fuel consumption, developing cost-effective catalysts with robust activity and durability has become paramount. This study introduces a novel catalyst, Pt6CuCo/Ti0.7W0.3O2, designed to address these pressing energy challenges. The approach involves doping cobalt (Co) and copper (Cu) into platinum (Pt), anchored to a Ti0.7W0.3O2 substrate, to optimize the electronic structure on the Pt surface. This optimization mitigates the adsorption capacity of oxidized species with Pt, thereby enhancing the methanol electro-oxidation reaction (MOR) activity of the material. Furthermore, this innovation overcomes the limitations associated with carbon-based catalysts, significantly bolstering durability. The Pt6CuCo/Ti0.7W0.3O2 catalyst exhibits remarkable electrocatalytic properties, including an onset potential, mass activity, and If/Ib ratio of approximately 0.1 vs NHE, 273.38 m2 gPt–1, and approximately 1.85, respectively. These values are in stark contrast to traditional Pt/C catalysts, which yield an onset potential of approximately 0.45 vs NHE, 193.28 m2 gPt–1, and an If/Ib ratio of approximately 0.89. The results obtained in this study underscore the immense potential of Pt6CuCo/Ti0.7W0.3O2 as a catalyst for MOR development, offering a promising solution to address the prevailing energy challenges and environmental concerns associated with conventional fossil fuel sources.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Tai Thien Huynh,Hau Quoc Pham,At Van Nguyen,Anh Tram Ngoc Mai,Son Truong Nguyen,Long Giang Bach,Dai-Viet N. Vo,Van Thi Thanh Ho
For the first time, a novel Pt catalyst supported on mesoporous Ti 0.7 W 0.3 O 2 nanoparticles , which exhibited superior advantages such as high conductivity (0.022 S/cm), large specific surface area (201.481 m 2 /g) and homogeneous morphology with 9 nm spherical-like particles, was prepared successfully via the rapid microwave-assisted polyol route. It is found that uniform 3 nm spherical-like Pt nano-forms were adhered homogeneous on the surface of Ti 0.7 W 0.3 O 2 . Intriguingly, the electrochemical surface area of Pt catalyst supported on mesoporous Ti 0.7 W 0.3 O 2 was found to be around 90.05 m 2 /gPt, which is profoundly higher than ECSA value obtained from Pt/C (E-TEK) catalyst. Furthermore, as for methanol oxidation reaction measurement, the I f /I b ratio of the 20 wt % Pt/Ti 0.7 W 0.3 O 2 catalyst was found to be approximately 2.33, which 2.5-folds higher than that of the commercial Pt/C (E-TEK) catalyst. Importantly, the chronoamperometry data also revealed that the 20 wt % Pt/Ti 0.7 W 0.3 O 2 catalyst possessed the higher durability than the commercial 20 wt % Pt/C (E-TEK) catalyst. In addition, the successful synthesis of the 20 wt % Pt/Ti 0.7 W 0.3 O 2 catalyst not only offers an attractive catalyst for fuel cell using methanol but also opens application potentials for solar cells, as well as biosensors.
研究领域:
材料科学
·
能源科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 10
·7177-7182
·
IF 1.354
Pham Hau Quoc,Huynh Tai Thien,Van Nguyen At,Van Thuan Tran,Bach Long Giang,Thanh Ho Van Thi
The degradation of Pt-based catalysts is considered as the main barrier to the commercialization of fuel cells. M-doped TiO2 (M is a transition metal) has been investigated to improve the stability of electrocatalysts. Recently, W-doped TiO2 materials have been
found as a good catalyst support for the photocatalyst applications but their application in Proton-exchange membrane fuel cell application has rarely been reported. In addition, the agglomeration of nanoparticles, which are synthesized from the organic precursor, has been reported. Here,
we report Ti0.7W0.3O2 nanoparticles prepared via a one-step solvothermal method with inorganic precursors without using surfactants or stabilizers for restricting nanoparticle agglomeration. The properties of the material were measured by XRD, TEM, BET, and
electronic conductivity. The mean particle size of ∼5 nm, the high specific surface area of 126.471 m2/g and a moderate electronic conductivity of 0.014 S/cm were obtained for the sample prepared at 220 °C for 4 h. It was observed that using inorganic precursors to prevent
particle agglomeration is more advantageous compared to organic precursors as mentioned in previous reports.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
SOLID STATE PHENOMENA
·
2018
·
IF 0
Hau Quoc Pham,Tai Thien Huynh,At Van Nguyen,Anh Tram Ngoc Mai,Vi Thuy Thi Phan,Long Giang Bach,Trinh Duy Nguyen,Van Thi Thanh Ho
The tungsten-modified titanium dioxide, which prepared through the one-pot solvothermal process, exhibited the large specific surface area (~ 202 m2/g) and greater electrical conductivity (~ 0.022 S/cm). Furthermore, for the comparison purpose to find appropriate approach for the synthesis 20 wt. % Pt NPs/Ti0.7W0.3O2 catalyst, the modified chemical reduction utilizing NaBH4 and the rapid microwave-assisted polyol using ethylene glycol were employed without any surfactants or stabilizers. The characterization of Pt-based electrocatalyst was investigated through XRD, SEM-EDX, TEM measurements. As result, the platinum nanocatalyst formation with the face-centered cubic structure (fcc) and the amount loading on Ti0.7W0.3O2 support approximately 20 wt. % of two synthesized methods. However, the diameter size and distribution of Pt nanoforms have clearly classified in two reduction route. For example, the Pt nanocatalyst, which was created by the rapid microwave-assisted polyol at 160 °C for 2 min, exhibited the good distribution on support with ~3 nm diameter. This could be ascribed to the fast and uniform heating of microwave-assisted and moderate reducing possibility of ethylene glycol. These results indicate that the rapid microwave-assisted polyol was an appropriate approach not only for synthesizing 20 wt. % Pt NPs/Ti0.7W0.3O2 catalyst but also for preparing Pt-based electrocatalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 2
·877-881
·
IF 1.093
Huynh Tai Thien,Pham Hau Quoc,Nguyen At Van,Nguyen Son Truong,Bach Long Giang,Ho Van Thi Thanh
In this work, mesoporous Ti0.7W0.3O2 materials with high conductivity and surface area as promising catalyst support for Pt in Proton-Exchange Membrane Fuel Cells (PEMFCs) were synthesized via a single-step solvothermal process at low-temperature without
using any surfactants or stabilizers. The characterizations of material are measured via XRD, TEM, SEM-EDS, and BET as well as electronic conductivity measurement. As a result, Ti0.7W0.3O2 formed a homogenous solid solution with mesoporous anatase-TiO2
structure and uniformly spherical nanoparticles morphology of about ~10 nm diameter, together with a high electrical conductivity of 0.022 S/cm compared to that of undoped-TiO2 (1.37×10−7 S/cm), which implied that tungsten (VI) ions was successfully doped
into anatase-TiO2 lattices. The N2 adsorption/desorption isotherms indicated that Ti0.7W0.3O2 is being mesoporous structure with high surface area up to ~202 m2/g, which is nearly similar to that of the commercial Vulcan XC72
(~232 m2/g). The Pt nanoparticles was easily anchored onto Ti0.7W0.3O2 surface by the chemical reduction process using NaBH4 as a reducing agent. The spherical Pt nanoparticles of ~9 nm in diameter were deposited uniformly on the mesoporous support.
These results suggested that mesoporous Ti0.7W0.3O2 materials synthesized are promising catalyst supports to replace carbon-based supports for Proton-exchange membrane fuel cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）