研究生英语文献汇报PPT课件

a vertically-aligned bimetallic Pt/Pd nanotube array
Scheme 1 Schematic drawing of the ion distribution in a porous alumina nano-template. Dashed lines show the electrical double layer of the classical Gouy– Chapman–Stern's model between (b) diffusion layer and (c) bulk layer regions in a nanochannel. Region (a) depicts a compact layer.
In this study, we achieved higher catalytic activity for methanol oxidation using the perpendicular bimetallic Pt/Pd NT array as a catalyst. The investigation of the catalytic properties of bimetallic materials paves a way to substituting expensive Pt with cost-comp. etitive materials in the future. 6
1. Introduction
Methanol oxidation in a direct methanol fuel cell (DMFC) can generate electrochemical energy. DMFC’S working principle:
Cathode catalyst
Waste heat
Anode
CH3OH + 3/2 O2 CO2 + 2H2O E0=1.183V
The article thought：
This oxidation usually needs a catalyst to lower the reaction barrier to make the process efficient. So far, platinum (Pt) is the most efficient catalyst in the field. Scarcity of Pt, which causes its high cost, inevitably impedes the active development of both scientific research and practical utilization.
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Experimental section
2. Experimental section
5 mM PdCl2 5 mM H2PtCl6 40 mM HCl
AAO
The lengths of the NTs can be controlled by using 0.3 to 2 C.
used fห้องสมุดไป่ตู้r deposition
shown in the SEM images, the resulting morphology of the nanostructures was quite homogeneous over a large area of the
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Results and discussion
3. Results and discussion
Synthesis of bimetallic Pt/Pd nano-tubes and morphology analysis
The average outer diameter and wall thickness of the Pt/Pd NTs were measured as 217 (39 nm) and 37(12 nm), respectively. As
Paper Review
Synthesis of bimetallic Pt/Pd nano-tubes and their enhanced catalytic activity in methanol electrooxidation
（双金属铂/钯纳米管的合成和其在甲醇电氧 化增强的催化活性）
李俊乾
H2O
O2
Loading
ee--
e-
H2O
H+
：
CH3OH
CO2 H2O
Cathode
Polymer membrane
Anode catalyst
Anode： CH3OH + H2O CO2 + 6H+
CO2 + 6e-
φ0=0.046V
Cathode：3/2 O2 + 6H+ + 6e- 3H2O φ0=1.229V
化学工程（专）
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14102932 1
Literature source
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Contents
1
Introduction
2
Experimental section
32 1 4
Results and discussion Conclusions
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3
1. Introduction
The shortage of traditional energy resources and serious environmental pollution due to combustion emissions have resulted in a number of scientific studies on the development of sustainable and clean energy, including fuel cells.
The utilization of single-component Pt in DMFCs suffers from serious carbon monoxide (CO) poisoning. CO, one of the main intermediate molecules, can easily stain Pt atoms, which deteriorates their catalytic activity.