立方体纳米Cu2O表面热力学函数的粒度及温度效应
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汤焕丰,黄在银,肖明
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Effects of Particle Size and Temperature on Surface Thermodynamic Functions of Cubic Nano-Cu2O
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Huan-Feng TANG,Zai-Yin HUANG,Ming XIAO
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| 表1 不同粒度和温度下纳米/块体Cu2O与HNO3反应体系的速率常数k和反应焓Δr HmӨ |
| Table 1 Rate constants (k) and reaction enthalpies (Δr HmӨ) of nano-and bulk Cu2O(s) in HNO3(aq) at different particle sizes and temperatures |
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| l/nm | T/K | ΔrHm?/(kJ·mol-1) | | 103k/s-1 | | 1 | 2 | 3 | average value | 1 | 2 | 3 | average value | | 42 | 298.15 | -232.47 | -232.48 | -232.52 | -232.49±0.03 | | 5.934 | 5.958 | 5.976 | 5.956±0.021 | | 308.15 | -206.55 | -206.53 | -206.60 | -206.56±0.04 | 6.502 | 6.543 | 6.683 | 6.576±0.095 | | 318.15 | -176.68 | -176.79 | -176.75 | -176.74±0.06 | 7.321 | 7.365 | 7.304 | 7.330±0.031 | | 55 | 298.15 | -218.30 | -218.31 | -218.35 | -218.32±0.03 | 5.517 | 5.525 | 5.482 | 5.508±0.023 | | 308.15 | -188.88 | -188.92 | -189.02 | -188.94±0.07 | 6.177 | 6.192 | 6.198 | 6.189±0.011 | | 318.15 | -158.27 | -158.32 | -158.16 | -158.25±0.08 | 6.883 | 6.907 | 6.769 | 6.853±0.074 | | 67 | 298.15 | -205.20 | -205.24 | -205.22 | -205.22±0.02 | 5.024 | 5.011 | 4.989 | 5.008±0.018 | | 308.15 | -180.12 | -180.01 | -180.11 | -180.08±0.06 | 5.643 | 5.683 | 5.690 | 5.672±0.025 | | 318.15 | -148.52 | -148.73 | -148.74 | -148.63±0.12 | 6.334 | 6.369 | 6.308 | 6.337±0.031 | | 116 | 298.15 | -192.18 | -192.12 | -192.09 | -192.13±0.05 | 4.553 | 4.541 | 4.558 | 4.559±0.009 | | 308.15 | -164.42 | -164.33 | -164.42 | -164.39±0.05 | 5.382 | 5.241 | 5.283 | 5.302±0.072 | | 318.15 | -133.68 | -133.77 | -133.95 | -133.80±0.14 | 5.975 | 5.980 | 5.961 | 5.972±0.010 | | bulk Cu2O | 298.15 | -176.55 | -176.56 | -176.51 | -176.54±0.03 | 3.653 | 3.676 | 3.667 | 3.665±0.012 | | 308.15 | -145.78 | -145.76 | -145.62 | -145.72±0.09 | 4.371 | 4.252 | 4.386 | 4.336±0.073 | | 318.15 | -110.25 | -110.48 | -110.26 | -110.33±0.13 | 4.925 | 4.999 | 4.986 | 4.970±0.040 |
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