Can the "and" word be replaced by the ampersand, "&", in citations with IEEE style?
IEEE is based on the Chicago Manual of Style.
It seems that the Chicago Style prefers to use the word and rather than ampersands (&amp;) in journal titles. See here for a remark regarding journal titles:

Since there is no easy way to check whether an author’s choices are random or scrupulous, conventionally editors have chosen one style or the other to impose throughout. Chicago prefers and. Even now that it’s possible to check online, we think it’s more expedient to choose one style and be consistent, given the amount of research it would entail to check the style of and in every title

Under the heading &quot;Permissible changes to quoted title&quot; (chapter 8.174), the manual even allows users to replace a given ampersand (&amp;) to an and (rather than vice versa):

When a title is quoted, its original spelling [...], hyphenation, and punctuation should be preserved. [...] As a matter of editorial discretion, an ampersand (&amp;) may be changed to and, or, more rarely, a numeral may be spelled out.