I wonder if there is a free black and white emoji font out there. All of the ones I have seen are in full color, but there are the two Unicode glyphs ☺, ☻, that's all I have seen.
This answer is copied from Black and white emoji fonts – enfascination
Noto Emoji Font Google has a fully internationalized font, Noto, whose emoji font has a black and white version: https://github.com/googlei18n/noto-emoji/tree/master/fonts The smiley’s are blobs.
EmojiOne EmojiOne is a color font with black and white fallbacks. I couldn’t figure out how to trigger the fallbacks, but I found an early pre-color version of EmojiOne: https://github.com/eosrei/emojione
Android Emoji Not sure why, but one of Android’s main Emoji fonts is black and white https://github.com/delight-im/Emoji/tree/master/Android/assets/fonts The smiley’s are androids.
EmojiSymbols A free font by an independent designer. http://emojisymbols.com/ You can convert from woff to ttf here
Microsoft Segoe UI Symbol Microsoft has a very high-quality emoji set in its Segoe UI Symbol/Emoji font. And because of copyright law, in which things have to be copyrighted separately for different uses, there shouldn’t be anything keeping us from using it to create printed type: https://en.wikipedia.org/wiki/Segoe http://www.myfontfree.com/segoeuiemoji-myfontfreecom126f132714.htm
FireFoxEmoji This might be from an old pre color version: https://github.com/mozilla-b2g/moztt/blob/master/FirefoxEmoji-1.6.7/FirefoxEmoji.ttf
Twitter’s Emoji font Twitter open sources its emoji font. This doesn’t have a black and white version, but it does have black and white fallbacks. If I can figure out how to extract or trigger the fallbacks, this could be great. https://github.com/eosrei/twemoji
There may be more at the bottom of this: https://github.com/eosrei/emojione and here https://wiki.archlinux.org/index.php/fonts#Emoji_and_symbols
I went through all of the previously posted options, and the only emoji that has black and white emoji as well as being up-to-date with unicode (ie- having all current emoji) is this Opentype font version of Twemoji: https://github.com/eosrei/twemoji-color-font. It is auto-generated from the color version though, so it's not as refined as some of the other less-complete emoji sets.
The difficulty is, the black and white versions of the emoji do not seem to be released as their own font or set of graphics. As far as I can tell, they are only accessible as a fallback in the "Opentype as SVG" font found on the releases page: https://github.com/eosrei/twemoji-color-font/releases. In Photoshop, converting the text to outlines will give you the black and white version of the font, but beyond that I'm not sure how to access them directly.
EDIT: Someone has also posted all of the b&w emojis as individual SVGs here: https://github.com/youdly/twemoji-color-font/tree/v11-release/assets/builds/svg-bw Currently, I don't believe there is a font version of these.